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Felisyl L-Lysine for Cats Immune System Support (60 Soft Chews)

Item: 5939
Availability: In Stock
Was: $19.99$14.99You Save: $5.00!(25%)


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Felisyl L-Lysine for Cats Immune System Support Soft Chews are a specially formulated dietary supplement designed to boost the immune system of your feline companion. These soft chews contain essential L-Lysine, an amino acid that plays a crucial role in supporting your cat's immune response.

Key Benefits:

  1. Immune System Support: L-Lysine is known for its immune-boosting properties, helping to strengthen your cat's natural defense mechanisms against common illnesses and infections.
  2. Respiratory Health: Felisyl L-Lysine helps maintain respiratory health in cats by reducing the severity and duration of respiratory symptoms associated with viral infections, such as sneezing, coughing, and congestion.
  3. Stress Relief: These soft chews can also help alleviate stress-related issues in cats, as stress can weaken the immune system. By providing L-Lysine supplementation, Felisyl promotes a healthier response to stress, ensuring your cat remains resilient and less susceptible to illnesses.
  4. Tasty and Convenient: The soft chews are not only beneficial but also palatable, making them easy to administer. Cats will enjoy the delicious taste, making it hassle-free to incorporate this supplement into their daily routine.
  5. Trusted Quality: Felisyl L-Lysine soft chews are formulated by veterinarians and made with high-quality ingredients, ensuring the safety and effectiveness of the product. They are a reliable choice to support your cat's immune system and overall well-being.

Give your feline friend the immune system support they need with Felisyl L-Lysine for Cats Immune System Support Soft Chews, providing a convenient and tasty solution to boost their health and vitality.

Immune Support for Cats

Fuel your pet with the supplements they need to remain healthy and boost their immune system with cat health supplements that add much-needed nutrients and amino acids to continue being active.


L-Lysine is an essential amino acid that your pet?s body doesn?t produce, so this supplement is the perfect aid that helps support your pet?s immune system so that it can function normally and produce antibodies. L-Lysine also helps maintain healthy tissue supports respiratory health.

Pet Health Supplement

A healthy immune system and eye health are essential for cats of any age. Ensure your furry friend remains active with healthy vision with these pet health supplements that help support normal inflammatory response and help support cat-eye health.


Guaranteed Analysis per Chew (1.5g):
Moisture (max) 18.6%
L-Lysine 250 mg


l-lysine, natural chicken liver flavor, oat flour, rye four, soy lecithin, brewers dried yeast, water, arabic gum, glycerin, canola oil, maltodextrin, sodium alginate, calcium sulfate, citrus pectin, oat meal, sorbic acid (a preservative), propionic acid (a preservative), mixed tocopherols (a preservative).

Useful Information

Give 1-2 chews daily


For animal use only.

Store in a cool dry place.

Keep out of reach of children and animals. Your pet may consider this a treat. In case of accidental overdose, contact a healthcare professional immediately.

Customer Reviews

3 Reviews
67% (2)
33% (1)
0% (0)
0% (0)
0% (0)
100% Recommend this product (3 of 3 responses)
By Laurie
Tampa, FL
Immune Boost
August 27, 2017
Just started using the product, but am already seeing a change. Chinos eyes loo better. Seems to be a great product
Seeing fast results Sometimes they gobble up the chews... sometimes they are not interested.
By Jan
Rural Hall, NC
After our Siamese stopped eating other lysine treats he immediately loved these!
December 17, 2015
Our Siamese had been on different lysine treats and quit eating them. We tried Felisyl and he loved the taste. No more struggle to get him to eat this necessary treat!
Appealing taste and soft None
By Jesse
Fremont, CA
Cats love this product
September 25, 2014
My cat's drippy eyes cleared right up.
Easy to give

Customer Q&A

1 Question & 1 Answer
from West Palm Beach, FL asked:
May 27, 2018
Are any of the ingredients in this product sourced in China. Where is it manufactured?
1 Answer
Hi Kristie, this is made is the USA
Submitted by: Customer Service on May 16, 2019