---
product_id: 49872293
title: "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"
brand: "dr. bill's"
price: "5180 kr"
currency: ISK
in_stock: true
reviews_count: 8
url: https://www.desertcart.is/products/49872293-dr-bill-s-feline-immune-support-boosts-cat-immunity-health
store_origin: IS
region: Iceland
---

# All-ages formula for kittens to seniors Clinically studied Beta Glucan & Turkey Tail Cellular defense with Vitamin C & Zinc 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

**Brand:** dr. bill's
**Price:** 5180 kr
**Availability:** ✅ In Stock

## Summary

> 🐱✨ Elevate your cat’s immunity—because healthy cats are happy cats!

## Quick Answers

- **What is this?** 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 by dr. bill's
- **How much does it cost?** 5180 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/49872293-dr-bill-s-feline-immune-support-boosts-cat-immunity-health)

## Best For

- dr. bill's enthusiasts

## Why This Product

- Trusted dr. bill's brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rapid Recovery Formula:** Colostrum and Echinacea accelerate immune response and reduce inflammation, helping your cat bounce back faster from illness.
- • **All Life Stages Covered:** Tailored for kittens, adults, and seniors, ensuring comprehensive immune support throughout your cat’s life journey.
- • **Cellular-Level Protection:** Powerful antioxidants Vitamin C and Zinc neutralize free radicals, reducing oxidative stress and promoting long-term cellular health.
- • **Science-Backed Immunity Boost:** Clinically proven ingredients like Beta Glucan and Turkey Tail Mushroom fortify your cat’s immune cells for year-round resilience.
- • **Veterinarian-Formulated & USA Made:** Created by Dr. Bill Barnett with 40+ years of expertise, crafted in the USA for purity, safety, and trusted results.

## Overview

Dr. Bill’s Feline Immune Support is a premium powder supplement designed to enhance your cat’s immune system at every stage of life. Featuring clinically studied ingredients like Beta Glucan, Turkey Tail Mushroom, Vitamin C, Zinc, and Colostrum, it supports cellular health, accelerates recovery, and helps protect against environmental and seasonal challenges. Developed by a leading veterinarian and made in the USA, this formula delivers trusted, science-backed immune defense for cats of all ages.

## Description

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

## Features

- 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, health defense, 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.

## Product Details

- **Brand:** Dr. Bill's
- **Item Form:** Powder
- **Active Ingredients:** Colostrum, Echinacea, Beta 1,3/1,6 Glucan, Turkey Tail Mushrooms, Nrf2 Antioxidant Activators, Vitamin C & Zinc
- **Item Weight:** 60 Grams
- **Product Benefits:** Immune Health | Immune Response | Cellular Protection | A Strong, Healthy Life

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/716XmgfaM3L.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Why is there so much arginine in the product? My herpes cat needs support but Im afraid to give it to him as arginine triggers the virus.**
A: Hello - Thank you for your question. We include Arginine in Feline Immune Support because Arginine is the most important essential amino acid required by the adult cat. Arginine detoxifies ammonia, which results from the breakdown of proteins. It also has an important function in the urea cycle. If a cat goes without Arginine for very long, even a few hours, it will die. The daily requirement is set at 2,600 mg/day for the average size cat.  Arginine is an essential amino acid, which means that it must come from their diet as they cannot produce it internally.   
Dr. Bill's The Feline Immune Support provides 29.06 mg of arginine/scoop or about 1.12% of the daily needs, as cats will also receive arginine in a healthy diet. 
The best sources of arginine: 
1.	Nuts and seeds. Seeds and nuts are high in arginine. Nuts and seeds are significant sources of arginine. 
2.	Meat products. Meat is a complete source of protein because it includes all of the amino acids the body requires, including arginine.
3.	Legumes. Chickpeas are a great source of protein and provide plenty of arginine. Legumes are a family that includes beans, peas, and pulses.
4.	Seaweed. Seaweed is a popular health food that provides high levels of arginine. A cup of dried seaweed contains 4.645 g of the amino acid.
You can see why wild cats prefer to hunt for animal source protein (red meat) since nuts, legumes and seaweed were not likely available sources.  Pet foods today may provide some red meat, but the most likely outcome is that most cats eating dry food or wet foods using seafood entrees or chicken need supplemental arginine in order to thrive.
Research shows that while it is true that Arginine has been shown to be required in the formation of herpesvirus capsid protein, most studies recommend NOT reducing arginine in the cat because it is so essential for health. Any correlation between maintaining normal arginine levels and the triggering of herpesvirus has not been shown. 
Let us know if you have any further questions!
Dr. Bill Barnett

**Q: I have always ordered health defense and ordered immune by mistake. cab it be returned if opened but not used?**
A: I would ask Amazon; being it was opened...

**Q: How many mg of lactoferrin is in this?   And is it bovine lactoferrin?**
A: There are 3.63 mg lactoferrin in every 630 mg level scoop.  Yes, it is bovine lactoferrin.

**Q: Can this help cats heal from Stomatitis?**
A: Feline Immune Support is designed to boost the innate immune system, which may help the body fight off the primary causes of stomatitis such as viruses, bacteria or periodontal disease.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Vitamin supplement/ immune support.
*by I***  on November 6, 2024*

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.

### ⭐⭐⭐⭐⭐ My cat loves it
*by B***E on September 15, 2024*

My cat is FVI positive can I recently got this to help boost his immune system he is suffering from a secondary infection and he has been on antibiotics for a while so he does love the taste of this I sprinkled it over hard cat food and he ate it just fine and he ate it while I mixed into his food the other thing I got along with is was the 15 and one multivitamin which has a bunch of necessary B12 and other multivitamins the only thing I do not like is the packaging in the scoop is extremely tiny so you have to dig around to find it inside of the pack which can make a mess

### ⭐⭐⭐⭐⭐ Alternative
*by M***S on July 23, 2025*

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.

## Frequently Bought Together

- 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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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-28*