VetClassics CAS Options Extra Strength Immune & Antioxidant Support Dog & Cat Supplement, 120 count

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About This Item

Details

  • The immune system is the surveillance system of the body, when the immune system becomes weakened, it is essential to reestablish a healthy immune system balance quickly to maintain overall health.
  • Mushrooms contain polysaccharides, beta glucans, and triterpenoids that work synergistically to help support the immune system.
  • Antioxidants Coenzyme Q-10, Vitamin A, Vitamin C, Vitamin E and Milk Thistle help to scavenge free radicals that can cause cellular damage.
  • MADE IN THE USA and VETERINARIAN FORMULATED - All Vet Classics products are veterinarian formulated and manufactured in the USA in an FDA audited, cGMP compliant facility.
  • SATISFACTION GUARANTEED - All Vet Classics products come with a 100% satisfaction guarantee, if you are not satisfied for any reason you can get a full refund!

Ingredient Information

Instructions

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Flavor           
Unflavored
Unflavored
Turkey
—
Hickory
Hickory
Hickory
—
Hickory
Turkey, Poultry
Unflavored
Turkey, Poultry
Packaging Type           
—
—
Bottle
Bag
—
Tub
Tub
Tub
—
Bottle
Bottle
—
Breed Size           
All Breeds
All Breeds
All Breeds
All Breeds
All Breeds
All Breeds
All Breeds
All Breeds
All Breeds
All Breeds
All Breeds
All Breeds
NASC Certified           
Yes
Yes
—
—
Yes
Yes
Yes
—
Yes
—
Yes
Yes
Made In           

Frequently bought together

Questions & Answers

1 Customer Questions

Is there chicken in the ingredients?

Answer by Chewy • Mar 04, 2021
For a complete list of ingredients you may select the "Nutritional Info" tab on the product page.
Reviews
Write a Review
4.8
Rated 4.8 out of 5 stars
46 Ratings
Terms & Conditions

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Effectiveness

90% Positive

Form and Administration

90% Positive

Ingredients

88% Positive

Nutritional Value

96% Positive

13 Customer Reviews

Rated 3 out of 5 stars
By Nicki on Oct 10, 2025

My dog didn’t like them

I have heard good things about this product. But my dog didn’t like them. Wouldn’t eat them. I have been trying for over a month. She won’t eat her food with it

I have heard good things about this product. But my dog didn’t like them. Wouldn’t eat them. I have been trying for over a month. She won’t eat her food with it crumbled in. She won’t eat it as a treat. The chews do crumble easily which was a plus. But they did have a very strong odor- earthy, musky smell which is why I don’t think she will eat them. Overall a good product ingredient wise. My girl is just picky I guess lol

Rated 5 out of 5 stars
By Mary on Jul 30, 2025

Chewable Supplement That My Dogs Love!

Finally, a supplement they will eat! No more hiding it in their dog food, just so they can spit it out. They love the taste too.

Finally, a supplement they will eat! No more hiding it in their dog food, just so they can spit it out. They love the taste too.

Rated 5 out of 5 stars
By Robin on Apr 18, 2025

Vetclassics

Big improvement in motion and will locking his feet ,no more goopy eye's.

Big improvement in motion and will locking his feet ,no more goopy eye's.

Rated 5 out of 5 stars
By Christine on Oct 14, 2024

Mushrooms are magic!

I was. Told about these from a dear friend who has raised dogs all her life. Her vet clinic at the university of pennsylvania recommended these. As the wife of

I was. Told about these from a dear friend who has raised dogs all her life. Her vet clinic at the university of pennsylvania recommended these. As the wife of a mushroom forager, mushrooms are healthy for dogs, too, not just humans. Glad this exists.

Rated 5 out of 5 stars
By Joyce on Sep 18, 2024

Flavorful Supplement

Our Great Dane has soft tissue sarcoma and our vet suggested this supplement to help boost his immune system. He loves the flavor and actually prefers them to t

Our Great Dane has soft tissue sarcoma and our vet suggested this supplement to help boost his immune system. He loves the flavor and actually prefers them to treats!

Rated 5 out of 5 stars
By Marlene on Sep 17, 2024

Fair price

I could have gotten this product from a veterinarian nutritionist in the city that I live in, but his price was more than Chewy. I save where I can.

I could have gotten this product from a veterinarian nutritionist in the city that I live in, but his price was more than Chewy. I save where I can.

Rated 5 out of 5 stars
By Linda on Nov 27, 2024

Easy chewables

My 9 year old golden is doing great with this supplement

My 9 year old golden is doing great with this supplement

Rated 5 out of 5 stars
By Charyl on Oct 18, 2024

CAS IS A FANTASTIC PRODUCT.

We are using this product on our Lily who has had surgeries for mast cell.

We are using this product on our Lily who has had surgeries for mast cell.

Rated 5 out of 5 stars
By Janette on Oct 19, 2024

Dog appeal

My boy loved these as treats instead of thinking he was taking meds.

My boy loved these as treats instead of thinking he was taking meds.

Rated 5 out of 5 stars
By Martresse on Oct 19, 2024

Vet recommended

My Dog loves them! He can’t wait to get these!

My Dog loves them! He can’t wait to get these!