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

By Felisyl
Rated 3.5714 out of 5 stars

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About This Item


  • 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.

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Nutritional Information

Feeding Instructions


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Top Ingredientsl-lysine, natural chicken liver flavor, oat flour...Active Ingredients: L-Lysine, N, N-Dimethylglycine HCl (D mg)....Active Ingredients: L-Lysine Hydrochloride 500 mg., Inactive Ingredients: Arabic Gum, Brewers Yeast...L-Lysine: 275 mg/10 chews (27.5 mg per chew), Colostrum (15% lgG): 55 mg/10 chews (5.5 mg per chew), Omega-3s (Fish Oil...L-Lysine in a palatable base.
LifestageKitten, Adult, SeniorKitten, Adult, SeniorKitten, Adult, SeniorAdultKitten, Adult, Senior
Health FeatureImmune SupportImmune SupportEye Care, Immune Support, Respiratory CareImmune Support, Respiratory Care, Allergy ReliefImmune Support
Food FlavorFruits & Vegetables, ChickenPoultry, Meat, Chicken, LiverHerbs & Spices, HickoryChicken
Food FormSupplementSupplementSupplementSupplementSupplement
Special DietNo Corn No Wheat No Soy, Non-GMO, Natural

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Rated 3.5714 out of 5 stars
7 Ratings
Would recommend to a friend

7 Customer Reviews

Rated 1 out of 5 stars
By alliecat on Apr 24, 2023

Didn't work

Had hopes that these treats could replace another L-Lysine treat that was loved but the formula changed or ingredients shifted or something and kitty stopped liking them cold. Anyway, these Felisyl treats smell and look exactly like the new/old treats, so no help at all. My discriminating kitty won't eat them. The Felisyl seem exactly like the other "updated" brand, same manufacturer, different brand I guess? One of my cats will eat these, but they just smell weird to me and I hesitate to give them to him. I always had to break the treats up into a few pieces, too big for my kitties.

Rated 3 out of 5 stars
By BostonGal67 on Sep 14, 2022

Not soft chews

The product universally liked by my cats, made by 21st century/essential pet appears to have been discontinued. I decided to try these instead. They are not soft and chewy. My cats are eating them, but I am not too sure how well they work.

Rated 1 out of 5 stars
By Katy on Feb 13, 2022

Hard not soft

I bought this for one of my cats at the recommendation of my vet. They are not chewy at all - they are very hard. I have 5 cats and offered them each a treat. No one will eat them. I tried breaking one up and putting it in their other dry food, and they eat around it. Terrible.

Rated 5 out of 5 stars
By Jessie on Jan 28, 2022

Definitely worth it

I was worried that my cats wouldn't like the flavor of these. On the contrary-I have to hide the bag! They're all over me as soon as they see it, and it's definitely made a difference because they're not sneezy within 24 hours of eating one!

Rated 5 out of 5 stars