VetriScience Vetri Lysine Plus Chicken Flavored Soft Chews Immune Supplement for Cats, 180 count

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At a Glance

  • Human-Grade
  • Immune Support
  • Skin & Coat Health
  • All Lifestages
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About This Item

Details

  • Lysine is an essential amino acid for cats that can only be ingested through food or supplements.
  • The paw-fect option for cats who need a boost of immune support, respiratory health support or who have conditions that are responsive to lysine.
  • Supports immune health especially for feline friends who are being boarded or who live in a home with multiple feline friends.
  • Soft chews crafted with a yummy chicken liver flavor.
  • Manufactured in the USA.

Ingredient Information

Instructions

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!

Shop VetriScience

Frequently bought together

Questions & Answers

6 Customer Questions

How many chews are in each package?

Answer by Chewy • Jan 13, 2021
Each package contains 180 chews.

How many packs in a multipack and how many chews per pack?

Answer by Chewy • Jan 21, 2021
There are 3 bags in the multipack, each containing 120 chews.

Hello, Does this product have the NASC seal?

Answer by Chewy • Aug 03, 2021
This supplement has the NASC Quality Seal. The NASC created its Quality Seal Program as part of its ongoing effort to improve and standardize the animal health supplement industry. The presence of the NASC Quality Seal on an animal health supplement signifies to consumers that the product comes from a reputable company that has successfully completed an independent quality audit.

Who manufacturers and where does product come from?

Answer by Chewy • Mar 13, 2021
This is manufactured by VetriScience Laboratories. They source their ingredients from all over the world, so the country of origin can vary from batch to batch. Typically, the ingredients used in this formula come from the US, Malaysia, China, Canada, Mexico, India, Italy, France, Japan, and Germany.
Reviews
Write a Review
4.1
Rated 4.1 out of 5 stars
79 Ratings
Terms & Conditions

Customers Mention

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

Ease of Use

80% Positive

Effectiveness

76% Positive

Ingredients

85% Positive

Long-Term Benefits

95% Positive

35 Customer Reviews

Rated 5 out of 5 stars
By Sheila on Nov 10, 2025

Cats love it

This was recommended to me by my vet because Kermit always has upper respiratory symptoms and lysine helps with that. The cats just think it’s a treat.

This was recommended to me by my vet because Kermit always has upper respiratory symptoms and lysine helps with that. The cats just think it’s a treat.

Rated 5 out of 5 stars
By Marianne on Jan 18, 2026

Eliminated chronic sneeze for Mikey and Leo's leaky eye.

They like them and think they are treats.

They like them and think they are treats.

Rated 3 out of 5 stars
By Monica on Sep 16, 2025

I wish

I truly wish my babes would have liked these treats. But nope. Now to test others. Think I’m doing doing the PetHonesty next.

I truly wish my babes would have liked these treats. But nope. Now to test others. Think I’m doing doing the PetHonesty next.

Rated 5 out of 5 stars
By Barbara on Aug 30, 2025

Settles sniffles and sneezes

Have used these over years when cats have had upper-respiratory issues. The cats love them, and they’ve been very helpful.

Have used these over years when cats have had upper-respiratory issues. The cats love them, and they’ve been very helpful.

Rated 5 out of 5 stars
By Sylvia on Aug 8, 2025

One of Oreo’s Favorite Treats

Ore’s vet recommended a supplement to support his immune system. Oreo loves them and it does seem to be helping. We are both happy!

Ore’s vet recommended a supplement to support his immune system. Oreo loves them and it does seem to be helping. We are both happy!

Rated 2 out of 5 stars
By Jerri on Jan 27, 2026

The smell

She will not eat them

She will not eat them

Rated 5 out of 5 stars
By Debra on May 16, 2025
Top 250 Contributor

Boost

One of my cats has a chronic bacterial infection in her sinuses (not viral) and for my other cats benefit (so they don't get sick w it too), I give them the Lysine

One of my cats has a chronic bacterial infection in her sinuses (not viral) and for my other cats benefit (so they don't get sick w it too), I give them the Lysine and so far so good. No one else has contracted it.

Rated 1 out of 5 stars
By Anna on Oct 16, 2025

Bad Taste

the 3 cats wouldn't get near this item

the 3 cats wouldn't get near this item

Rated 5 out of 5 stars
By Judy on Sep 1, 2025

Meds for Ahhie

This is the only immune medication Annie will eat

This is the only immune medication Annie will eat

Rated 5 out of 5 stars
By Victoria on Jun 15, 2025

Helps with eye drainage

I have a cat with one eye and the lysine seems to help with the drainage he has.

I have a cat with one eye and the lysine seems to help with the drainage he has.