5 Best Immune Support Supplements for Dogs (2026 Picks)

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A dog’s immune system is not a single switch you can flip. It is a layered defence built from gut health, nutrition, sleep, stress levels and age. That is exactly why the immune support aisle is confusing: some products are mushroom blends, some are colostrum powders, some are broad multivitamin-style chews, and a few are herbal tablets that read more like traditional medicine than nutrition.

For this roundup we pulled the live Amazon.com listings for seven dog immune support products, read the declared ingredient panels, the manufacturer directions, the storage and safety text, and the customer reviews. We kept the five strongest all-round picks in the quick table below and added two more specialised options further down for owners who are targeting something specific, such as turkey tail mushrooms for a dog with lumps and bumps.

Everything below is descriptive. Nothing on this page is a diagnosis or a promise of a health outcome. Immune support supplements may support normal immune function in a healthy dog, and that is the most any label can honestly say. If your dog is unwell, on medication, recovering from surgery or undergoing chemotherapy, talk to your veterinarian before you add anything to the bowl.

Quick Picks: The 5 Best Immune Support Supplements for Dogs

Prefer to compare them side by side on Amazon? You can open the full immune supplement range here: dog immune support supplements on Amazon.

How We Chose These Immune Support Supplements

We did not test these products on our own dogs, and we did not run lab assays. What we did was read every listing the way a careful owner would, and we scored the products on five things that are actually verifiable.

• Declared ingredient panel: does the listing name the active ingredients, or does it hide behind a proprietary blend?
• Published directions: is there a body-weight chart, a scoop rule, or nothing at all?
• Storage and safety text: does the manufacturer tell you how to store it and when to call a vet?
• Form and size: powder, soft chew or tablet, and how many days the container realistically covers.
• Review consistency: what do repeat buyers keep mentioning, and what do the unhappy reviews keep mentioning?

We deliberately excluded listings with no verifiable ingredient panel and listings whose reviews were dominated by shipping or packaging complaints rather than the product itself. We also excluded any listing that promised to fix, reverse or prevent a disease, because no supplement is allowed to make that claim and no responsible roundup should repeat it.

What Immune Support Actually Means for a Dog

Immune function in dogs depends heavily on the gut, because a large share of immune tissue sits in the intestinal lining. That is why so many immune products overlap with digestive products, and why you will see probiotics sitting next to mushroom extracts on the same label.

The ingredients used in this category generally fall into a handful of families:

• Colostrum, which is the first milk produced after birth and is naturally rich in immunoglobulins. Labels often state an IgG percentage, for example colostrum listed at 15 percent IgG.
• Beta glucans, polysaccharides usually derived from yeast or from mushroom cell walls, which are the ingredients most mushroom supplements are built around.
• Medicinal mushrooms such as turkey tail, reishi, shiitake, maitake, lion’s mane and cordyceps.
• Vitamins and minerals with recognised roles in normal immune function, including vitamin C, vitamin E, vitamin B6, zinc and selenium.
• Amino acids and antioxidants such as L-glutamine, L-arginine, L-glutathione and citrus bioflavonoids.
• Adaptogenic and traditional botanicals such as ashwagandha, astragalus, echinacea, milk thistle, turmeric and bacopa.

None of these is a drug. A well-made supplement may support a normal immune system, and that is a much smaller claim than the marketing language around it usually suggests. If a listing tells you a chew will clear an infection or shrink a tumour, that is a red flag rather than a selling point.

Key Ingredients to Look For on the Label

If you only read one panel before buying, read the ingredient list rather than the front of the tub. Here is what the labels on the products in this roundup actually declared, so you can compare apples to apples.

• Colostrum with a stated IgG percentage. Dr. Bill’s lists colostrum at 15 percent IgG on the panel, which is the kind of specificity worth looking for.
• Beta glucan with a stated source. Mycogen states that its beta glucan is purified from yeast, and its mushroom side includes reishi, shiitake and maitake.
• Named mushroom extracts rather than mushroom powder. The Vet Promise panel names shiitake, turkey tail, lion’s mane, maitake, phellinus, cordyceps and reishi extracts individually.
• Zinc and vitamin C together. Both appear on the Dr. Bill’s panel, alongside vitamin E and vitamin B6.
• Simple single-ingredient options. Super Snouts lists organic turkey tail and little else, which makes it the easiest product here to reason about.

The counter-example is a listing that lists only a category, such as an active ingredient field that names a single herb while the description text promises a broad blend. That mismatch is worth noticing, because it tells you the panel was not written with the same care as the marketing copy.

1. Dr. Bill’s Canine Immune Support (Best Overall Powder)

Full listing title: Dr. Bill’s Canine Immune Support | Boosts Dog Immunity and Health with Colostrum, Beta Glucan, Turkey Tail Mushroom, Zinc & Vitamin C | Powder Supplement for Dogs of All Ages. ASIN B075H9ZYH2.

This is the broadest formula in the roundup. The declared panel reads like a veterinary textbook chapter rather than a single hero ingredient, and it is one of very few products here that publishes an IgG percentage for its colostrum.

• Item form: powder, bacon flavour, 6.3 ounces.
• Declared ingredients: beta glucan, organic turkey tail mushroom extract, Coriolus versicolor, colostrum at 15 percent IgG, calcium caseinate, organic astragalus root, echinacea extract, L-arginine hydrochloride, vitamin C as ascorbic acid, citrus bioflavonoid complex, L-glutamine, bacopa leaf, ashwagandha root extract, milk thistle seed, organic turmeric root, L-glutathione, zinc from zinc monomethionine, Lactobacillus acidophilus, vitamin E, vitamin B6, beef protein isolate, chicken liver, natural bacon flavour and whey protein concentrate.
• Manufacturer directions as published: dosages may be administered once a day or split and provided twice daily; sprinkle the product onto any canine diet and mix in or moisten to make a protein-rich broth. No body-weight chart is published, so the serving is worked out from the scoop in the tub.
• Storage and safety text as published: to assure freshness and avoid settling, shake periodically, keep sealed, and store in a cool, dry place.

Owners who reviewed it tended to say the powder disappears into food without a fight. The most common positive phrasing was simply that their dog loves it, and several mentioned that it goes in easily wet or dry. Ingredient transparency came up repeatedly as the reason people kept buying it. The most common complaints were softer: that results were gradual and hard to judge, and that the scoop has no markings, so you end up eyeballing the dose.

If your dog is a fussy eater or you are managing a serious condition under veterinary care, this is the pick we would raise first with your vet. You can check the current listing here: Dr. Bill’s Canine Immune Support on Amazon.

2. Mycogen Immune Support for Dogs (Best Soft Chew With a Weight Chart)

Full listing title: Mycogen Immune Support for Dogs – Beta Glucan, Reishi, Shiitake & Maitake Mushroom Blend – Helps Boost Immunity & Defend Against Illness – Vet-Formulated – 60 Tasty Liver-Flavored Soft Chews. ASIN B076FXK1V7, brand Pet Health Solutions.

Mycogen is the product in this roundup with the clearest published dosing, and it is the one we would hand to a dog that refuses anything sprinkled on food. It pairs a purified yeast beta glucan with a mushroom blend, and the listing states that the formula meets the quality control standards of the National Animal Supplement Council.

• Item form: liver-flavoured soft chew, 60 chews, 15.9 ounces.
• Directions as published: administer the soft chew directly to the dog, during or after a meal, and double the daily amount for the first three weeks. Up to 15 lbs, half a chew; 16 to 40 lbs, one chew; 41 to 90 lbs, one and a half chews; over 90 lbs, two chews.
• Declared inactive ingredients: dibasic calcium phosphate, fish oil, glycerin, macrogol, magnesium stearate, molasses, natural antioxidants, pork liver powder, sucrose, vegetable fibre, vegetable oil, vegetable shortening and vegetable starch.
• Label positioning: free from artificial colours and flavours, and intended for daily long-term use in dogs of all sizes.

Review themes were fairly tight for a smaller listing. Owners described a boost in energy, coat quality and general vitality, said their dogs treat the chew as a snack, and several identified themselves as repeat buyers. On the negative side, one reviewer complained about a short remaining shelf life on arrival and one reported that the product made their dog unwell. That second review is the reason we repeat the standard advice: introduce any new supplement alone, at the low end of the dose, and stop if your dog reacts badly.

See the current listing here: Mycogen Immune Support for Dogs on Amazon.

3. ThorneVET Immune Support Formula (Best Multi-Pet Pick)

Full listing title: ThorneVET Immune Support Formula – Immune Support for Dogs & Cats, 90 Soft Chews. ASIN B0B3262ZPZ.

ThorneVet is one of the better known veterinary supplement lines, and this is the only product in our roundup that is explicitly labelled for both dogs and cats, which makes it convenient in a mixed household. The listing describes a formula built from vitamins, minerals, amino acids and botanicals, and it names echinacea and reishi mushroom specifically. Amazon’s own search listing for the product also notes that it contains L-glutamine and vitamins A, B, C and E.

• Item form: the title and the product images describe 90 soft chews for dogs and cats.
• One thing worth flagging honestly: the specification table on the same listing displays conflicting form data, showing an item form of powder with a 12.7 ounce item weight and an 8 ounce unit count. This looks like a shared specification table across ThorneVet formats rather than a description of the chew tub, so check the title and the pack photo before you order.
• Dosing: the listing does not publish a body-weight chart for the chew format, so we are not going to invent one. Follow the label in the tub and confirm the serving with your veterinarian.

Only a handful of owners had reviewed it, and the themes were about trust and palatability rather than dramatic change. Buyers said the chews were fresh and easy for their dogs to chew, that their dogs took them without hesitation, and one owner of performance dogs described it as a quality product. The negative reviews were equally specific: two dogs refused the chews outright, and one owner reported no visible change.

If you keep both a dog and a cat, this is the most economical way to hold one immune formula in the cupboard. Check it here: ThorneVET Immune Support Formula on Amazon.

4. PET SUPPLEMENTS & NUTRITION LLC Immune Boost for Dogs (Best Herbal Tablet)

Full listing title: PET SUPPLEMENTS & NUTRITION LLC Immune Boost for Dogs – Advanced Dog Immune Support – Veterinarian Recommended Complex – Dog Milk Thistle chew – 2 Bottles (120 Treats). ASIN B07NPQLCFG.

This one is the outlier in the group and we are including it mainly so you know what a weaker listing looks like. It is a herbal tablet rather than a chew or a powder, sold as two bottles, and the description names an organic mushroom blend alongside milk thistle extract, turmeric root, burdock root, licorice root, red clover, ashwagandha and selenium.

• Item form: tablet, herbal flavour, 14 ounces total, described in the title as 120 treats across two bottles.
• Declared active ingredient field: the listing’s own specification field names a single herb, licorice, while the description promises the much broader blend listed above. That gap between the panel and the copy is the main reason this product sits fourth rather than higher.
• Safety text as published: the listing carries the standard regulatory notice that dietary supplement statements have not been evaluated by the FDA and that the product is not intended to be used to diagnose or to prevent any disease or health condition.
• Dosing: no body-weight serving guide is published on the listing.

When we checked, the listing showed no customer reviews and no featured offer, so there is no meaningful review pattern to report. That is not a reason to assume the product is bad, but it is a reason to be careful, because you would be buying without any independent owner feedback.

If you specifically want a herbal tablet format, look at the current page and decide for yourself: Immune Boost for Dogs on Amazon.

5. Vet Promise Turkey Tail Mushroom for Dogs (Best Turkey Tail Chew)

Full listing title: Turkey Tail Mushroom for Dogs – 170 Chews – Mushroom Supplement for Dogs | Lion’s Mane, Reishi, Shiitake, Immunity Support Multivitamin Vitamins for Joint Health, Energy, Gut, Skin & Coat, Made in USA. ASIN B0D3431VTN, brand Vet Promise.

This is the most reviewed product in the roundup, with more than three thousand ratings, and it is the one whose review pattern is most worth reading carefully. It is a chicken-flavoured soft chew built around a seven-mushroom extract blend, and the panel extends well beyond mushrooms into joint and general wellness territory.

• Item form: chicken-flavoured soft chew, 170 chews, 13.7 ounces.
• Declared ingredients: mushroom powder made up of shiitake extract, turkey tail extract, lion’s mane extract, maitake extract, phellinus extract, cordyceps extract and reishi extract, plus cranberry powder, glucosamine HCL, salmon oil, MSM, vitamin C, chondroitin from bovine, papaya, basil leaf powder, boswellia extract at 20 to 1, ashwagandha root, vitamins B1, B3, B5, E, B6 and B12, zinc, biotin, and a probiotic blend of L. plantarum, L. acidophilus, L. casei, B. bifidum, L. lactis and L. fermentum.
• Directions as published: feed as a daily treat or mix with food per the weight-based serving guide, and consult your veterinarian before starting any new supplement.

Amazon’s own review summary for this product is unusually balanced, and it is worth quoting in substance: buyers find the chews effective, with some reporting noticeable improvements in their pets’ wellbeing; the treats are soft and easy to chew and many dogs treat them as a snack; but some owners report their dogs will not eat them at all; opinions are also split on overall value, and the scent gets mixed reactions.

The recurring positive theme in the individual reviews is lumps and bumps. Owners repeatedly describe turkey tail as the reason they bought the product, with several saying existing lipomas got smaller and others saying their older dog became brighter and more mentally alert. The recurring negative themes are equally clear: some dogs simply refuse the chew, some owners saw no change at all in their dog’s lumps, and a few mentioned mild itching in the first couple of weeks of use.

Because this product attracts owners managing lumps, we want to be blunt about the boundary. A supplement may support normal immune function. It does not address a tumour or a diagnosis, and any lump should be assessed by a veterinarian rather than managed with a chew. With that said, it is a well-reviewed, soft, easy-to-give chew: Vet Promise Turkey Tail Mushroom for Dogs on Amazon.

6. YUMA’S Guard Buddy Turkey Tail Mushroom Chews (Best All-in-One Chew)

Full listing title: Turkey Tail Mushroom for Dogs – 170 Count – Mushroom Chews for Dogs | Dog Supplement for Lipoma Lumps & Bumps – Immune Health, Digestive, Skin, Energy & Joint Support – Guard Buddy Multivitamin. ASIN B0FMWJS9XV, brand YUMA’S.

This one carries an Amazon’s Choice badge and is a newer arrival, first listed in August 2025. It is a multivitamin-plus-mushroom chew rather than a pure immune formula, which makes it a reasonable choice if you would rather give one chew instead of three.

• Item form: mushroom chews, 170 count, 14.1 ounces. The listing’s specification table does not name an item form, although the title describes mushroom chews.
• Declared mushroom blend: turkey tail, reishi, lion’s mane and shiitake, positioned for immune function, gut health, joints, skin and coat, and cognition.
• Dosing: no body-weight serving chart is published on the listing, so follow the tub label. We are not going to guess a number that the manufacturer did not state.
• Sizing: the same product page offers other pack sizes including 120 chews, 170 chews, 340 chews and a 340-chew value pack.

The review pattern here is very similar to the other turkey tail chews, which is itself informative: owners who are happy keep talking about lumps and about older dogs acting younger, and the dogs that like them apparently really like them, with one reviewer describing a dog who reminds them every morning not to forget the chew. The unhappy reviews cluster around the same thing as the Vet Promise listing: dogs that will not touch them, and lumps that stayed the same size or got bigger.

If you want an all-in-one chew and your dog is not fussy, this is a sensible companion pick: YUMA’S Guard Buddy Mushroom Chews on Amazon.

7. Super Snouts Turkey Tail Mushroom Powder (Best Single-Ingredient Powder)

Full listing title: Super Snouts Turkey Tail Mushroom Supplement Powder for Dogs & Cats, 5.29oz | Supplement Powder with Organic Turkey Tail Mushrooms for Antioxidant, Immune & Inflammation Support, Made in USA. ASIN B08PCBC99L.

Super Snouts is the simplest label in the roundup, and in this category simple has real value. If you want one mushroom and nothing else, this is the easiest product here to reason about, and the powder carries a USDA Organic certification on the listing.

• Item form: powder, turkey tail flavour, with a scoop included. The listing title states 5.29 ounces while the specification table states an item weight of 2.64 ounces, so check the pack size on the page before ordering.
• Directions as published: give one heaping scoop per 25 lbs of body weight daily, administered orally, sprinkled on top of wet or dry food. Double the dose for the first ten days as a loading phase to increase initial absorption.
• Positioning on the label: for pets experiencing general discomfort from the natural ageing process or from normal seasonal or skin allergies, and as a daily supplement to support immune and cellular health.

The one-heaping-scoop-per-25-pounds rule is the cleanest body-weight guide of any product in this roundup, and it scales predictably whether you have a spaniel or a great dane. Review themes mirror the rest of the turkey tail category, with owners describing more energy, better mobility in a senior dog, help with inflammation and improved digestion. The negatives were the familiar ones plus one specific packaging complaint, that the container arrived less than half full, and one owner whose dog would not eat it.

If you want a single-ingredient organic turkey tail powder for a dog or a cat, this is our pick: Super Snouts Turkey Tail Mushroom Powder on Amazon.

Powder, Soft Chew or Tablet: Which Form Should You Choose?

Form is mostly an administration problem, not a health one, but it decides whether the tub actually gets used.

• Powder is the easiest way to give a large dose of a broad formula, and it is the hardest form for a dog to refuse, because it disappears into wet food or a little broth. It is also the least precise form when the manufacturer does not publish a weight chart, which was the case for two of the powders here.
• Soft chews are the most reliable form for a dog that will take a snack, and they are the only form in this roundup with a published body-weight table on the listing, from Mycogen. The trade-off is that chews carry a longer ingredient list, including sugars, oils and starches, which matters if your dog has food sensitivities.
• Tablets suit owners who want to avoid the oils and sweeteners used in chews, but the only tablet here belongs to the weakest listing in the group, with no published directions and no owner reviews at the time of writing.

One practical point that comes up in almost every review section: dogs are individuals. A chew that one dog inhales like a biscuit will be refused outright by the next dog, even within the same household. If you are unsure, start with the smallest pack in the format you prefer rather than committing to a large tub.

Dosing and Body-Weight Guidance: What the Labels Actually Say

This is where the category separates itself. Some brands publish clear numbers, and others leave you to work it out from a scoop.

• Mycogen publishes a full weight table: half a chew up to 15 lbs, one chew from 16 to 40 lbs, one and a half chews from 41 to 90 lbs, and two chews over 90 lbs, with the daily amount doubled for the first three weeks.
• Super Snouts publishes a scoop rule: one heaping scoop per 25 lbs of body weight daily, doubled for the first ten days as a loading phase.
• Vet Promise directs owners to feed per the weight-based serving guide on the label and to consult a veterinarian before starting.
• Dr. Bill’s publishes dosing frequency rather than a weight table: once daily or split twice daily, sprinkled onto food.
• ThorneVET and YUMA’S do not publish a body-weight chart on the listings we reviewed, and the herbal tablet listing publishes no serving guidance at all.

Two rules are worth carrying across every product. First, when you start a new supplement, begin at the low end of the published serving rather than the headline serving. Second, keep a simple note of when you started, what you changed and what you observed, because immune support is not something you can measure by looking at a dog on a Tuesday.

Storage and Safety Notes

Supplement labels are legally careful, and the safety text is often the most useful paragraph on the page. Here is what the products in this roundup actually publish.

• Dr. Bill’s states that you should shake the tub periodically to prevent settling, keep the product sealed, and store it in a cool, dry place.
• Mycogen states that its supplements meet the National Animal Supplement Council quality control standards, that the formula is free from artificial colours and flavours, and that it is intended for daily long-term use.
• Super Snouts states that the turkey tail is grown, harvested, produced and packaged in the United States, is non-GMO, and holds USDA Organic certification.
• The herbal tablet listing carries the standard regulatory notice that dietary supplement statements have not been evaluated by the FDA and that the product is not intended to be used to diagnose or to prevent any disease or health condition. The same notice applies in substance to every product on this page.

Storage advice is not filler. Powders with colostrum, oils and probiotics lose potency faster than tablets, which is why the powder labels ask for a cool, dry place and a sealed lid, and why one reviewer’s complaint about a short remaining shelf life on arrival is worth taking seriously. Check the expiry date when the tub arrives, and if it is close, ask for a replacement.

What Dog Owners Say in the Reviews

Reading across all seven listings, the same handful of themes come back in both the praise and the complaints.

• Palatability decides everything. The single most common complaint across the whole category was not that a product failed to work, but that the dog refused to eat it. Two of the turkey tail chews attracted exactly this complaint, and the ThorneVET chews drew it twice.
• Owners of senior dogs are the core audience, and the changes they describe are behavioural: more energy, more mental awareness, moving more easily, acting younger.
• Lumps and bumps dominate the turkey tail reviews. Some owners report that lipomas got smaller, and others report no change at all. Both patterns are well represented, which is exactly why we have not repeated a reduction claim anywhere on this page as though it were settled.
• Ingredient transparency earns loyalty. The most common reason owners gave for re-buying was simply that they liked the ingredient panel.
• Scepticism is common and understandable. Reviewers repeatedly said they could not tell whether the product was helping, which is a fair observation about a category where the honest claim is support rather than correction.

The balanced summary is this: in this category, a dog that eats the product and tolerates it well is most of the battle, and any effect is gradual and best judged over weeks alongside good general care.

How to Introduce a New Immune Supplement Safely

• Talk to your veterinarian first, particularly if your dog is on medication, has a diagnosed condition, is pregnant or nursing, is a puppy, or is recovering from surgery or chemotherapy.
• Introduce one new product at a time, so that if something goes wrong you know what caused it.
• Start at the low end of the published serving and hold there for the first week before moving to the full serving.
• Watch for vomiting, loose stool, itching, restlessness or refusal to eat, and stop the product if any of these appear.
• Give it with food unless the label says otherwise, since powders and chew ingredients are both easier on the stomach alongside a meal.
• Store the product as the label directs, keep the original packaging with the batch number, and note the start date.

If your dog is having chemotherapy, radiotherapy or immunosuppressive therapy, do not add an immune supplement without your oncologist’s agreement, because immune-modulating ingredients can interact with those therapies in ways that are not obvious.

When to Call Your Veterinarian Instead

An immune supplement is not a substitute for a diagnosis. Please contact your veterinarian promptly if you notice any of the following.

• A new lump or bump, a lump that is changing size, or a lump that is ulcerated or painful.
• Persistent lethargy, weight loss, poor appetite or a change in drinking and urination.
• Repeated vomiting or diarrhoea, or blood in the stool.
• Fever, unexplained limping, swollen lymph nodes or recurring infections.
• Any sudden behaviour change in an older dog.

This matters most for the turkey tail products, because the most heavily reviewed listing in this roundup is bought by owners who are worried about a lump. A chew may support normal immune function, and it is not a reason to delay a veterinary examination.

Frequently Asked Questions

Do immune support supplements actually work in dogs? The honest answer is that they may support normal immune function in a healthy dog, and that the evidence is strongest for individual ingredients such as beta glucans, colostrum and specific mushroom extracts rather than for the category as a whole. No supplement in this roundup is a medicine for a disease.

Can I give a dog and a cat the same immune supplement? Some products are labelled for both, and the ThorneVET formula in this roundup is one of them. Others, including most dog chews, are formulated and flavoured for dogs only, so read the label rather than assuming.

Are turkey tail mushrooms safe for dogs? Turkey tail appears on the ingredient panels of several well-reviewed dog products and is generally treated as a food-adjacent ingredient at label servings. Individual dogs can still react, and any dog with a health condition should be cleared by a veterinarian first.

How long before I see a change? Reviewers who noticed anything usually described it over weeks rather than days, and many said they could not tell at all. If you are going to try a product, give it a fair trial at the label serving, keep notes, and judge the result honestly at the end rather than day by day.

Can I stack a powder and a chew? Two products can easily overlap, and combining a broad multivitamin chew with a mushroom chew may double up on zinc, vitamin C or the same mushroom species. Pick one immune product at a time unless your veterinarian specifically advises otherwise.

Final Thoughts on the Best Immune Support Supplements for Dogs

If you want one broad, transparently labelled powder, Dr. Bill’s Canine Immune Support is the pick we would raise with a vet first, because the panel names its ingredients and states the colostrum IgG percentage. If your dog will not take powder and you want a published weight chart, Mycogen is the clearest chew option. If you keep a cat as well, the ThorneVET formula covers both. If turkey tail mushrooms are specifically what you are after, the Vet Promise chews and the single-ingredient Super Snouts powder are the two most straightforward ways to buy them, with the YUMA’S chew a reasonable all-in-one alternative.

Whichever you choose, go in with realistic expectations, start low, give it several weeks, and keep your veterinarian in the loop. An immune supplement sits alongside good nutrition, regular exercise, dental care and preventive veterinary visits. It does not replace any of them.

As an Amazon Associate, HerbandFur earns from qualifying purchases. Product details, ingredient panels, directions and review themes on this page were taken from the live Amazon.com listings at the time of writing, and listings do change, so always read the current label and directions before you buy. This article is for general information only and is not veterinary advice; consult your veterinarian about your own dog.