Good luck, and I hope it isn't serious. Let us know the news when you find out what's what.
I had Tink tested for feline Leukemia, negative. Vet says she seems perfectly healthy. BUT, she has lost weight, and is a total home body now. Very quiet and un-frisky! I think she has suffered a head trauma, all I can figure. Thank you for taking the time to write me. I will check on the cardiomyopathy, whatever that is! Tink's mom
Take your kitty to the vet. there's a number of disorders that can cause this. feline Leukemia, cardiomyopathy... there was no initial infection at all? It just happened over night? Then it's likely something along the lines of the first two.
i'm assuming there's no sign of head trauma or changed behavior as well?