Dr. Bill’s Feline Immune Support | Boosts Cat Immunity and Health with Colostrum, Beta Glucan, Turkey Tail Mushroom, Zinc & Vitamin C | Powder Supplement for Cats of All Ages
$17.99
Price: $17.99
(as of Oct 22, 2025 23:29:37 UTC – Details)
From the brand
Made in the United States
All Dr. Bill’s Supplements are made in the United States under strict quality standards.
Veterinarian Developed
Dr. Bill is an established pet nutrition expert and has been developing products since 1982. His years of experience ensure that safety, efficacy, and palatability are built into each supplement.
Human-Grade Ingredients
Our supplements are made with high-quality, natural ingredients that are biologically appropriate for the cat and dog to provide proactive nutritional support for a variety of health concerns.
Is there a real Dr. Bill?
YES! He is one of America’s most famous animal nutrition researchers. Dr. Bill developed products for many of the top brands of dog food but ultimately grew frustrated by their insistence on profit over quality. Dr. Bill is passionate about maximizing the health and longevity of dogs so he started his own line of dog supplements prioritizing proven research and searching for the best ingredients in the world.
Dr. Bill’s Canine Products
Dr. Bill’s Canine Products
Dr. Bill’s Feline Products
Dr. Bill’s Feline Products
Is Discontinued By Manufacturer : No
Product Dimensions : 2.83 x 2.83 x 3.07 inches; 2.12 ounces
Date First Available : September 9, 2017
Manufacturer : Dr. Bill’s
ASIN : B075HCGDXL
Best Sellers Rank: #24,894 in Pet Supplies (See Top 100 in Pet Supplies) #6 in Cat Antioxidant Supplements
Customer Reviews: 4.3 4.3 out of 5 stars 491 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Supports a Strong, Resilient Immune System: Helps your cat fight off illness, recover faster, and stay healthy year-round with proactive daily immune support. Ideal for kittens, adults, and senior cats.
Backed by Science, Powered by Nature: Features clinically studied ingredients like Beta Glucan and Turkey Tail Mushroom to strengthen immune cells, support gut health, and defend against bacteria, viruses, even environmental and seasonal allergies.
Protects at the Cellular Level: Nrf2 Antioxidant Activators, Vitamin C, and Zinc help neutralize harmful free radicals, reduce oxidative stress, and support healthy cellular function for long-term wellness.
Promotes Faster Recovery & Response: Colostrum, Echinacea, and other immune-boosting compounds aid T-cell activity and reduce inflammation, helping your cat bounce back quicker from everyday immune challenges.
Veterinarian-Formulated & Made in the USA: Developed by Dr. Bill Barnett, one of America’s top animal health experts with 40+ years of experience. Crafted in the USA with premium ingredients for purity, safety, and results you can trust.
Customers say
Customers report that the supplement boosts their cats’ immune system and makes their fur super soft. Moreover, the product receives positive feedback for its quality and taste, with one customer noting their cat licks it straight from their hand. However, experiences with diarrhea are mixed, with some customers reporting their cats feel better while others experienced vomiting. Additionally, opinions on value for money are divided, with some considering it a good price while others find it not worth the cost. The scoop size receives negative feedback, with several customers noting its absence.
13 reviews for Dr. Bill’s Feline Immune Support | Boosts Cat Immunity and Health with Colostrum, Beta Glucan, Turkey Tail Mushroom, Zinc & Vitamin C | Powder Supplement for Cats of All Ages
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$17.99
Joanna Gregory –
Helping my cat.
My cat loves the flavour and it’s really helped him. He’s stopped over grooming, his hair is growing back and he’s much happier and more content. Clearly doing some good.
LC –
Works!!!!
Noticed a HUGE improvement on a cat we rescued from the side of the road. Sheâs struggled since we found her now she is looking and feeling so much better.
I love this perfume. I wear it often. It makes me feel beautiful. –
Vitamin supplement/ immune support.
My cat prince is about 10 years old. So I thought I would try this vitamin supplement. It works great! He has more energy and his fur is so much softer now. I love it. I think it’s a really good product and not expensive at all.
shahalie –
Easy to use
My cat has severe stomatitis. The usual treatment is to pull all of their teeth. I did that. Cost and pain aside it did not improve his condition. I was told 20% dont respond to this approach. So now my boy is on a lifetime of steroid treatments. It is an autoimmune condition and my vet recommended this product. It tastes good, or so my cat says. It comes with a little scoop and I mix it with water and he drinks it. It is supposed to support the immune system, and I think I am able to dose the steroids furthur apart. The only drawback is that it is a small bag and kind of pricey.
Ferrer –
Sistema inmunológico saludable
Excelentes ingredientes y el servicio es rápido.
Kathy –
NO SCOOP!
No scoop. Conversion is very difficult. How do you measure .63 grams without a small scale. I finally used a scant 1/2 t. My cat vomited 1/2 hour later. Threw it in the trash.
Busra Ilbeyı Hakımı –
Our cat did not like the taste
I donât want to affect the review by giving 1 star thats why I gave 3 stars.We have 2 cats.Both of them didnât like the taste.And they throw out after eating it. I throw out the package to the trash.
M. HARRIS –
Alternative
I always used Imuquin but sometimes it was hard to get do I wanted to try another brand. So far this is working as well. Benefits are you can use a little less and it is already all in powder form. The other came in little packets. All in all I’d say this is a great alternative.
Naj –
Bought this because my cat has been sneezing a lot so to boost immune system , but ended up having so much side effects and I throw it away after one use
Kamy Barolet –
4/5 stars because even mixed with moisty food, cat has a hard time going through the bowl. But he’s in a good mood. Good value for money, ok taste, helps his skin health, not to itch and fur to be shiny and energy levels, good quality product.
Ang P –
My elderly cat has been experiencing skin irritation (undiagnosable) I seen this stuff and decided to give it a try. The package is pretty small but the dose is small aswell so it does last quite some time.My kitty likes the taste. The powder sticks to the food, no moistening required.After wwks of use kitty’s skin has cleared up, she is getting her hair back already, liking her skin way less. Everything else I tried did nothing for her so this is amazing stuff in my opinion. I will be purchasing again but hoping I can catch it on sale next time.
Diana –
I love these supplements but the packaging sucks. Itâs hard to get the scoop out and itâs messy. Could use a solution for the scoop too. I feel like it gets buried in the containers either way
Kate –
0/4 kittyâs would eat their food with this in it sadly. They are seniors and picky, but I thought at least one would take to it