Immune System Support for Cats - Amino Acid L-Lysine - Produce Antibodies - Healthy Tissue, Respiratory Health, Vision - 60 Soft Chews

$7.43 USD

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Boosts Feline Immune Defense Naturally – Each soft chew delivers 250 mg of L‑Lysine, an essential amino acid that supports antibody production and strengthens immune response—ideal for cats prone to upper respiratory conditions and immune challenges.
Supports Respiratory & Eye Health – Helps reduce the frequency and severity of symptoms associated with feline herpesvirus (FHV-1) such as sneezing, nasal discharge, congestion, and watery eyes.
Tasty Chicken-Liver Flavored Soft Chews – Highly palatable soft chews make daily dosing stress-free. Most cats love the flavor, making it an easy treat-like experience with no mess or struggle.
Vet-Formulated, NASC Certified & Made in USA 🇺🇸 – Developed by veterinarians and manufactured in the USA under strict quality standards. Certified by the National Animal Supplement Council (NASC) to ensure product integrity, safety, and label accuracy.
Daily Immune Support for All Cats – Safe and effective for kittens, adult cats, and seniors. Helps maintain long-term wellness and comfort—just one chew per day mixed into food or given directly.

Flavor	Chicken
Item Form	soft chew
Active Ingredients	amino acid,glycerin,pectin,sodium alginate,sorbic acid,soy
Product Benefits	Immune System Support: Felisyl Immune System Support Soft Chews are a delightful way to provide essential support to your cat's immune system. Enriched with L-Lysine, a crucial amino acid, these soft chews help your cat stay healthy and resilient.
Specific Uses For Product	Active
Allergen Information	Codfish Free
Global Trade Identification Number	00814087005939
Unit Count	1 Count
Manufacturer	HealthyPets
UPC	814087005939 644766572892
Included Components	Felisyl
Item Type Name	Felisyl
Model Number	5939
Manufacturer Part Number	5939
Warranty Description	2 Years
Target Species	Cat

The video showcases the product in use.The video guides you through product setup.The video shows the product being unpacked.
Felisyl Customer Testimonial

Why Cat Parents Choose Felisyl

Easy-to-give daily gel formulated to help support immune health, clear eyes, and respiratory wellness -without the struggle of pills or powders.
Trusted Support for Cats in Need of Extra Care

Felisyl was designed to make daily immune support easier for both cats and the people who care for them.

The video showcases the product in use.The video guides you through product setup.The video shows the product being unpacked.
Birttany's Testimonial on Felisyl