Pet Naturals L-Lysine Cat Chews are a su-purr easy way to support your furbaby’s health. These chews contain the L-lysine, an essential amino acid that supports your best friend’s immune system, eye and respiratory health. They’re purr-fect for kittens and senior cats, multi-cat homes and stressful times like boarding or grooming. A chicken liver flavor makes these chews extra tasty.