Felisyl Chicken Flavored Soft Chew Immune Supplement for Cats, 60 count

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  • Immune Support
  • All Lifestages
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About This Item

Details

  • Supplies L-Lysine to help support immune health and antibody production in compromised cats.
  • For use in cats and kittens with conditions responsive to L-Lysine.
  • Helps support respiratory, tissue, and eye health in cats.
  • Easy-to-administer soft chews taste like chicken liver.
  • Each package comes with 60 chews.

Ingredient Information

Instructions

FAQ

Learn More About Felisyl From Our Team of Experts

Felisyl L-Lysine Immune System Support

Breathe easy knowing your cat's respiratory system is supported for optimal wellbeing with Felisyl. Known for its immune-boosting properties, L-lysine helps strengthen your cat's natural defense mechanisms against common illnesses and infections.

Symptom Management

L-lysine is frequently used to manage symptoms associated with feline herpesvirus type-1 (FHV-1), a common viral infection in cats. Symptoms of FHV-1 include sneezing, eye discharge, and respiratory issues.

Tasty and Convenient

Felisyl L-lysine is easy to administer. It comes in granules, gel, and tasty soft chew form, making it hassle-free to incorporate into your cat’s daily routine. Your kitty will enjoy the delicious taste, too!

Supports Eye and Respiratory Health

Felisyl L-lysine can help reduce the severity, duration, and frequency of flare-ups of respiratory symptoms associated with viral infections, such as sneezing, coughing, and congestion.

About Pet Health Solutions

Pet Health Solutions is built on a philosophy of holistic pet care and wellbeing. With veterinarians on staff, their optimized formulations of supplements, topical, and dental products meet strict NASC (National Animal Supplement Council) standards.

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Questions & Answers

1 Customer Questions

From which country(ies) are the ingredients sourced?

Answer by Chewy • Feb 20, 2025
The ingredients are sourced in the USA.
Reviews
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2.9
Rated 2.9 out of 5 stars
57 Ratings
Terms & Conditions

34 Customer Reviews

Rated 1 out of 5 stars
By Jasmine on Oct 26, 2025

Hard and Stinky

After searching for a lysine treat with fewer fillers and a good dose of lysine, I was hoping this would be a hit for my Wilson. He would have nothing to do with

After searching for a lysine treat with fewer fillers and a good dose of lysine, I was hoping this would be a hit for my Wilson. He would have nothing to do with this treat. They have an off putting smell and, unlike advertised, they are hard not soft. Onto the next I guess.

Rated 1 out of 5 stars
By Pamela on Sep 29, 2025

Cats won't eat them.

The gel in a tube works better because I can mix it in with their food and they don't notice it, but they won't eat the chews.

The gel in a tube works better because I can mix it in with their food and they don't notice it, but they won't eat the chews.

Rated 2 out of 5 stars
By Mary on Jan 19, 2026

Too big and difficult to chew

My cat would not eat it

My cat would not eat it

Rated 3 out of 5 stars
By Louise on Jan 17, 2026

Didn’t like

Cats didn’t like

Cats didn’t like

Rated 2 out of 5 stars
By Zoe on Feb 24, 2025

I had to break it into smaller pieces for my cat to eat iT

Not sure why but my cat struggled to eat these because. They were too dense/hard. My cat loves crunchy treats and soft ones. But these soft ones weren’t really soft

Not sure why but my cat struggled to eat these because. They were too dense/hard. My cat loves crunchy treats and soft ones. But these soft ones weren’t really soft. They might have been stale I’m not sure. It was easier for her to break them up. It just isn’t easier for me so I’m using something else. However, I can’t complain about the medicinal aspect, as these were helpful for my cats health!

Rated 1 out of 5 stars
By Kim on Sep 15, 2025

Failure

My cats won’t eat them. They’re to hard

My cats won’t eat them. They’re to hard

Rated 5 out of 5 stars
By Robin on May 16, 2025

These work fast!

My little orange tabby had weepy eyes. I started giving him these and his eyes cleared right up.

My little orange tabby had weepy eyes. I started giving him these and his eyes cleared right up.

Rated 3 out of 5 stars
By Lauren on Apr 24, 2025

I bet it works

I bet it works, but it's really difficult to get my spoiled cats to eat it.

I bet it works, but it's really difficult to get my spoiled cats to eat it.

Rated 5 out of 5 stars
By Kristine on Dec 17, 2024

Large butt, soft treats

I bought these for my kitten, it was recommended that she take a lysine supplement to help her immune system. These treats are pretty large, but they are soft. She

I bought these for my kitten, it was recommended that she take a lysine supplement to help her immune system. These treats are pretty large, but they are soft. She generally will not eat them right away, but will eat them if they sit in her dish. I think they are large overall for a cat treat.

Rated 1 out of 5 stars
By Darla on Feb 8, 2025

Didn't work for us

The treats were hard and the cats would smell them, but not eat them. :( BUT I switched to the L-Lysine paste by FELISYL, and they LOVE IT!!

The treats were hard and the cats would smell them, but not eat them. :( BUT I switched to the L-Lysine paste by FELISYL, and they LOVE IT!!