Q. I just adopted a 6 yr old female blue Russian mix, she has had all her shot but I noticed she started sneezing frequently and there's clear discharge.
A. Chronic upper respiratory infections are common in cats, and flare-ups can occur at times of stress. Hopefully this will clear up on its own, but bring her to the vet if she starts to act lethargic or lose her appetite, if the discharge looks white, yellow, or green instead of clear, or if she starts having labored breathing or breathing with her mouth open. Ask your vet whether L-Lysine might help prevent future outbreaks.