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

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At a Glance

  • Immune Support
  • Calming
  • Vitamins & Minerals
  • All Lifestages
  • All Breeds

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$71.99 Chewy Price
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$78.99 List Price
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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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Questions & Answers

3 Customer Questions

What is the natural flavoring listed in the inactive ingredients?

Are any of the ingredients in this product from China?

Answer by Chewy • Dec 18, 2023
This supplement is made in the USA with globally sourced ingredients.

Is this product made from organic ingredients?

Answer by Chewy • Mar 23, 2025
This supplement is not labeled as organic.
Reviews
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4.7
Rated 4.7 out of 5 stars
37 Ratings
Terms & Conditions

Customers Mention

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

Ease of Use

96% Positive

Effectiveness

95% Positive

Ingredients

96% Positive

Long-Term Benefits

88% Positive

17 Customer Reviews

Rated 3 out of 5 stars
By Marie on Nov 20, 2025

My dog liked them and ate them out of my hand. Now he spits them out.

I'm wondering if you changed the ingredients in any way. What may I put on them so I can feed them to him again?

I'm wondering if you changed the ingredients in any way. What may I put on them so I can feed them to him again?

Rated 5 out of 5 stars
By Michael on Jul 10, 2025

It works!

We have a very large dog diagnosed with mast cell tumors. We have removed the largest surgically but when other large tumors started appearing, additional procedures

We have a very large dog diagnosed with mast cell tumors. We have removed the largest surgically but when other large tumors started appearing, additional procedures were too risky with his size. We started him on this supplement and his tumors shrunk in size and have not grown anymore. Granted, they will never disappear but this has helped slow everything down. Bonus is his allergies are better with this supplement, as well!

Rated 5 out of 5 stars
By ERICA on May 13, 2025

Immune system strength

This supplement and two other prescriptions are keeping my 10 yr old lab who was diagnosed with liver cancer more time with us. So far her lab work has improved

This supplement and two other prescriptions are keeping my 10 yr old lab who was diagnosed with liver cancer more time with us. So far her lab work has improved and it doesn’t seem like she’s in pain or the cancer is spreading. I know a few other people who have their dogs and cats on this seems to help

Rated 5 out of 5 stars
By Carol on Jan 14, 2025

Great healthy supplement

My Australian shepherd is a VERY picky eater so I try to supplement with things I know she needs. This product has a variety of mushrooms which are wonderful for

My Australian shepherd is a VERY picky eater so I try to supplement with things I know she needs. This product has a variety of mushrooms which are wonderful for a dog’s healthy immune system and full of antioxidants. I have to break the tablet into her fod because like I said she is SO picky.

Rated 5 out of 5 stars
By Elaine on May 19, 2025

Vet recommended

Vet recommended for my fur baby who has cancer

Vet recommended for my fur baby who has cancer

Rated 3 out of 5 stars
By Anita on Jan 11, 2025

Still growing

I bought this in hopes it would slow down my dogs lymopa lump but after 2 bottles I it still seems to be growing

I bought this in hopes it would slow down my dogs lymopa lump but after 2 bottles I it still seems to be growing

Rated 5 out of 5 stars
By Rhonda on Jan 1, 2025

Quality

Recommend by our regular and holistic vets both. That’s a great recommendation!

Recommend by our regular and holistic vets both. That’s a great recommendation!

Rated 5 out of 5 stars
By Amber on Jul 21, 2024

Vet recommended

Part of treatment for a tumor and it's working!

Part of treatment for a tumor and it's working!

Rated 3 out of 5 stars
By Carol on Apr 11, 2024

Now very pricey

The jump in price was enormous.

The jump in price was enormous.

Rated 5 out of 5 stars
By April on Jul 16, 2023

Great product

My holistic vet highly suggested this product and it has helped our precious schnauzer so much with her immune system and energy!

My holistic vet highly suggested this product and it has helped our precious schnauzer so much with her immune system and energy!