VetriScience Lysine Plus Lysine Immunity Health Chicken Flavored Chews Immune Supplement for Cats, 120 count

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About This Item

Details

  • These chews feature a new look and new name, but they’re the same great Lysine Plus formula.
  • They feature high-quality L-lysine to support your kitty’s immune and respiratory health, antioxidant levels, and more.
  • They help protect your furbaby’s immune health daily or during periods of discomfort including sneezing, runny nose, and watery eyes.
  • The chews help support immunity and wellness in cats and kittens of all ages, sizes, and breeds.
  • These su-purr tasty chews feature a natural chicken flavor.

Ingredient Information

Instructions

FAQ

Learn More About VetriScience From Our Team of Experts

Breathe Easy, Adventure Hard

VetriScience Lysine Immunity Health supplements give your cat the best daily support for respiratory, eye, and immune health. Science-backed lysine formulas for cats are made with premium ingredients and trusted by veterinarians everywhere to support strong, healthy immune systems at any age!

Advanced Formulas with Premium Ingredients

L-Lysine

An essential amino acid that promotes antibody production and helps curb respiratory discomfort.

 

Prodiet Lactoferrin

Supports and stimulates immune cells and helps to disrupt bacterial growth.

 

DMG

Helps to boost immune system response and helps the body to cope with stress.

Life's An Adventure. Lysine Helps Them Live It.

Multiple science-backed lysine formulas provide a perfect immune boost for every breed, size, and age.

  • Promote immune health
  • Strengthen immune response
  • Help them breathe easy
  • Support clean, clear eyes
  • Help manage seasonal allergies
  • Help kittens & seniors bounce back faster

No Fake Stuff. No Fillers. No Joke.

VetriScience immune support formulas use highly researched, trusted ingredients not found in other lysine supplements for cats—without fillers, hidden ingredients, or harmful preservatives. Each formula is carefully designed by veterinarians and nutrition experts, so you're only giving your cat what they need, with nothing they don't. Guaranteed.

About VetriScience

For over 40 years, VetriScience has helped pets live a life without boundaries. Premium pet supplements are formulated by veterinarians, recommended by pet professionals, and trusted by champions. VetriScience is committed to using only pure and highly researched ingredients to produce quality products that are safe, effective, and delicious!

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VetriScience
Lysine Plus Lysine Immunity Health Chicken Flavored Chews Immune Supplement for Cats, 1...
$20.99 Chewy Price
($0.18/ea)
Rated 3.9 out of 5 stars
1.8KReviews
Flavor         
Chicken, Liver, Meat, Poultry
Chicken
Turkey, Poultry
Turkey, Poultry
Turkey, Poultry
Turkey
Chicken, Poultry
Turkey, Poultry
Turkey, Poultry
Packaging Type         
Bag
Bag
Bottle
Bottle
Bottle
Bottle
Tub
Bottle
Bottle
NASC Certified         
Yes
Yes
No
Sourced From         
Various
United States
United States
Ingredients         

Questions & Answers

25 Customer Questions


How big are these treats? My cats love treats but they can't handle large kibble bits. Are these bite sized treats?

Answer by ChewyNov 11, 2019
These chews are approximately the diameter of a dime.

Can my cat with kidney disease take this?

Answer by ChewyOct 29, 2018
Due to your pet's diagnosed condition, we encourage consulting your Veterinarian to see which chews would be safe for them. Each pet's condition can vary and the vet will be able to monitor them and give the best recommendations according to your pet's tested levels.

What milligram of lysine is in each chew?

Answer by ChewyJul 03, 2017
There are 250 milligrams of L-Lysine per 2 chews.

Fish flavor?

Answer by ChewyAug 30, 2018
This product has a chicken liver flavor.

3.9
Rated 3.9 out of 5 stars
1810 Ratings

1250 Customer Reviews



Rated 1 out of 5 stars
By Beverly on Sep 27, 2025

Choosy cats did not choose this

One cat tried it 2 days in a row, and either threw up her food or refused to eat for several days. We stopped giving these to her and she finally got her appetite

One cat tried it 2 days in a row, and either threw up her food or refused to eat for several days. We stopped giving these to her and she finally got her appetite back. None of the other 6 cats was willing to eat it after smelling or licking it. One cat has feline herpes, and we really hoped that these would help keep her symptoms under control, as the colds get passed from one cat to another. This cat didn't even lick it. I know all cats are different. The vet had recommended Lysine, but it was a hard NO with out crowd.


Rated 1 out of 5 stars
By Rhenda on Sep 11, 2025

My cat does not like this batch

All my previous lysine chews looked very different than this batch. Think dark brown chocolate. Had a smooth consistency like a tootsie roll. Niko ate them for his

All my previous lysine chews looked very different than this batch. Think dark brown chocolate. Had a smooth consistency like a tootsie roll. Niko ate them for his eyes for whenever he's around the fan or window on a windy day. This new batch looks nor feels like the older batches. Light to medium brown. Very grainy and dry. The first few he had over a few days, he eventually thru them up. Now he won't touch them. I want to buy more but hesitate not knowing if they (vetriscience) changed the ingredients or if I received a bad batch? I wonder if anyone else has noticed such a change in theirs as well?..


Rated 2 out of 5 stars
By Christine on Sep 21, 2025

Smashed chews

On Order 5019184193 I ordered the Vetriscience Immunity Health 90-piece chews for my cat. When I took it out of the box it was perfectly flat. When we opened the

On Order 5019184193 I ordered the Vetriscience Immunity Health 90-piece chews for my cat. When I took it out of the box it was perfectly flat. When we opened the item, many of these soft chews are smashed together. To separate them into a serving, they break apart. Can you send the 28 lb. box of cat litter separate from the cat treats & the canned food? Appreciate your assistance with this.


Rated 5 out of 5 stars
By Alicia on Aug 23, 2025

Seems to Work

My cat is an exotic shorthair and because of that he has issues with watery eyes and a snarfly nose from to time. This does seem to clear it up as long as I am consistent

My cat is an exotic shorthair and because of that he has issues with watery eyes and a snarfly nose from to time. This does seem to clear it up as long as I am consistent with giving it to him daily (which I'm not always good about it). The only downside for my cat, because he is a freak of nature, the chunk is a little too big and hard for his weirdly shaped mouth, so I have to crush it up into smaller pieces and sprinkle it on his food so he can eat it.


Rated 5 out of 5 stars
By Christine on Sep 22, 2025

Cats love these!

I started giving my two cats these treats when they were kittens and have continued as adults. I break them in half to make it easier for them to eat them and they

I started giving my two cats these treats when they were kittens and have continued as adults. I break them in half to make it easier for them to eat them and they love them. Helps one of my guys when he has a FHV flare up.


Rated 5 out of 5 stars
By tatiana on Aug 2, 2025

A must for my FIV+ cat

My FIV+ cat has terrible allergies and really sensitive skin. Always scratching himself and irritating his skin, the only thing that helped manage it was allergy

My FIV+ cat has terrible allergies and really sensitive skin. Always scratching himself and irritating his skin, the only thing that helped manage it was allergy pills until we discovered this. I have not had to give him any allergy pills since he started taking these and his coast is as healthy as ever! He loves eating them and in fact my other 3 cats stole a bunch when i accidentally left the bag out, so taste wasn’t an issue for them either. Will continue to repurchase these!


Rated 5 out of 5 stars
By Brandi on Sep 27, 2025

My senior cat is picky, and she eats these right down.

As a pet owner it is difficult to find cat products that are clean ingredients. This is a decent product that is in a treat form with a high dose of the Lysine.

As a pet owner it is difficult to find cat products that are clean ingredients. This is a decent product that is in a treat form with a high dose of the Lysine.


Rated 1 out of 5 stars
By Alexandra on Sep 12, 2025

Too chewy for my cat to eat.

I have a 3 year old cat and even for him these were very chewy to eat. He tried multiple times. I even tried breaking them in pieces and it was too difficult to

I have a 3 year old cat and even for him these were very chewy to eat. He tried multiple times. I even tried breaking them in pieces and it was too difficult to chew.


Rated 3 out of 5 stars
By Donna on Sep 10, 2025

My cat isn’t a fan

She knows they might be good for her so she won’t eat them. But I was able to hide them in her food. Not sure if they are helping her at this time.

She knows they might be good for her so she won’t eat them. But I was able to hide them in her food. Not sure if they are helping her at this time.


Rated 5 out of 5 stars
By Jamie on Sep 14, 2025

Great treats

I have noticed better fur and less coughing from my cats since putting this into their routine, even the pickiest of my group likes this one

I have noticed better fur and less coughing from my cats since putting this into their routine, even the pickiest of my group likes this one