My cat has FHV-1. What can a vet do to help her feel better?
I have to say that I have never heard of a cat dying from FHV. It is normally a very mild disease, producing only a mild upper respiratory infection and occasionally conjunctivitis. Rarely immunocompromised cats (i.e.those that have other illnesses, such as feline leukemia or feline AIDS) can get pneumonia from FHV, but again, that's rare. Most cats that are chronically infected do well with supplementation with the amino acid lysine, which keeps the virus from rapidly reproducing, and keeps most cats symptom-free. In comes in a variety of formulations that cats will readily eat - try the brand Viralys, which makes powder, gel, and treats.
Updated on September 23rd, 2025