I have a 10-year-old female Bengal cat who has been a solo indoor cat since I got her at 4-5 months old. A few days ago (29/11) I adopted a 4-5-month old male kitten from a rescue group. Prior to me adopting him, he was living with a fosterer who has other cats. Both my resident cat and the new kitten are vaccinated. I have been keeping the new kitten in his own room and they haven't been sharing any bedding, food bowls, litter, etc. however I have been stroking and playing with the new kitten, and then doing the same with my older cat, in the interests of scent-swapping.
When I first got the kitten, I let my older cat smell the empty cat carrier. She was very growly for about 24 hours ,but otherwise she was behaving and eating normally. Gradually over the past few days I noticed her losing interest in her food. Yesterday I could only get her to eat a few treats, and today I couldn't get her to eat anything at all. She has also been quite lethargic since yesterday and it seemed like she just wanted to sleep. Later in the day I saw her vomiting a tiny bit of white foam. I took her to the vet who said she was dehydrated and had a slight temperature, so they gave her fluids, an antibiotic, an anti-emetic, and an appetite stimulant tablet for me to give her (although I'm not sure how I'm going to do this since she's not eating her food). They also took bloods so I'm waiting on the results of those.
Right now I'm just really worried that the new kitten has somehow passed something on to my older cat (via my hands), and I feel like it's my fault. I did ask the vet about this, but understandably they can't really comment until they get the blood results.
I just wondered if anyone else has had similar experiences with a resident cat getting sick after adopting another cat/kitten? For anyone who commonly fosters multiple cats, is it common for them to pass on minor bugs/ailments? I know I need to just wait on the blood results and go from there but I'm so anxious
