*** 4th of July Sale! Get 15% off with promo code: JULY4 ***

EntirelyPets Online Pet Supply 

Home > Food Supplements > Lysine Products > Felisyl Immune System Support > 

6-PACK Felisyl® Immune System Support (360 Soft Chews)

Item Number: 5939-6PK
Regular Price: $97.99Sale Price: $53.99
One Time Order

Autoship & Save!    [MORE DETAILS]

Send Page to Friend


Felisyl Immune System Support for Cats is a safe nutritional supplement for your cat if it has a condition that is responsive to L-lysine. L-lysine has been known to reduce the harshness and number of occurrences of herpes simplex viral infections. These infections result in fever blisters and cold sores. L-lysine is an effective ingredient of Felisyl Immune System Support for Cats.

In cats, the herpes virus is considered very contagious. What makes it so problematic is that it is a very common cause of upper respiratory infections (URIs). Symptoms of URIs include eye discharge and sinus congestion in your cat. You may also notice some squinting of the eyes and sneezing as part of the effects of an upper respiratory infection. Felisyl Immune System Support for Cats can help.

Felisyl is an easy to use nutritional supplement that kittens and cats alike seem to find tasty. It is easy to administer by simply mixing it in with their cat food.

Other benefits to Felisyl Immune System Support for Cats are that it helps promote healthy tissue, encourages respiratory health, and can even help with your catís vision. It is effective, easy to administer, and has some nice additional healthy side effects.

Administration: Approximately 1 to 2 Soft Chew L-Lysine daily.


chicken liver flavor, starch, L-lysine, water, soy lecithin, canola oil, brewer's yeast, glycerin, oat flour, barley flour, rye flour, oat meal, calcium sulfate, maltodextrin, sodium alginate, sobric acid, propionic acid (a preservative), mixed tocopherol blend (a preservative).

Guaranteed Analysis per Chew
Moisture ......... 18.6 %
L-Lysine ......... 250 mg

Give 1 - 2 chews daily.

Warnings: For animal use only.

Store in a cool dry place.

Keep out of the reach of children and animals. In case of accidental overdose, contact a health professional immediately.

Felisyl® is a manufactured in the USA in FDA and USDA approved facilities following current Good Manufacturing Practice (GMP) GUidelines.

Customer Reviews

Click here to see all reviews
3.80 rating based on 5 reviews
My "go to" Lysine chews by Heidibear03/25/2013

I have rescue cats and some have "eye" issues and benefit from Lysine. Well, there are many forms of Lysine out now, thank goodness but all of the ones my cats are supposed to like...they don't! They are so difficult!! Anyway, These chews are the most moist you can get and are easy to chew. I just widh they had more Lysine per chew, and for that I would add the 5th star! Can't have it all though huh? Thank you!

by Anita03/16/2013

This is an excellent product but the last couple of batches have been hard not soft and my cats won't eat it....I sent emails about that and they are supposed to be sending some out to replace the last ones I got...but this batch is hard too....

One of the Best purchases ever. by BABS from FL12/08/2012

My Cat Lilly is doing good on this product her sniffles and sneezing are lessoning. It is much easier to give her the treat. Though I must cut it in three pieces and put it with some of her other treats. Its much simpler to get her to eat her immune support soft chew. That is why I reordered 6 more packages. She is currently doing well on 3 treats a day. She is also much more alert and active. with her upper resputory illmess.I would recommend this product to other cat lovers. Try it.

by from 04/24/2013

Last winter I purchased a three pack. My cats loved them. They were "fish" flavored, dark colored and moist. I recently received a six pack shipment. These are chicken flavored, beige tan and harder. All three cats turn up their noses and walk away.

the by formulation? from IWhat


wonderful by Neeter06/11/2012

Our cats really love them...no trouble getting them down...great for when I am not feeding wet food...


Questions and Answers

Felisyl® Immune System Support (60 Soft Chews)Felisyl Soft Chews
Reg price: $24.99
Sale price: $9.99
3-PACK Felisyl® Immune System Support (180 Soft Chews)3-PACK Felisyl® Immune System Support (180 Soft Chews)
Reg price: $50.99
Sale price: $27.99
Felisyl® L-lysine Gel for Cats (5 oz)Felisyl® L-lysine Gel for Cats (5 oz)
Reg price: $14.99
Sale price: $10.99
3-PACK Felisyl® L-lysine Gel for Cats (15 oz)3-PACK Felisyl® L-lysine Gel for Cats (15 oz)
Reg price: $38.99
Sale price: $29.99

Stay Connected

Copyright 1999 - 2015 EntirelyPets.com - All Rights Reserved
Sitemap - Privacy Policy - Mobile Site - Contact Us - Careers

CALL US TOLL FREE: 1-800-889-8967


~ My Account Login ~

Sign into your EntirelyPets Account for the best experience!