i have an eight month old ragdoll tom cat, and recently brought home an eight week old female ragdoll kitten. when we first brought her home she was very sick, having been exposed to the coronavirus. thankfully, she didn't develop FIP. since then, our tom has been gradually losing weight. he used to have a very healthy appetite but barely eats a thing now. he yowls all the time and is constantly scraping around in his litter box. the cats are kept apart most of the time, but we let them run around together several times a day.
i'm concerned that he might have caught something from the new kitten. or is it possible that he's just reached sexual maturity and it' all just a behaviour thing?