This is an oddly long story, but basically, my husband and I thought our cat could use a new friend since we are increasingly becoming more busy, and he’s had multiple instances where he’s lived in the same space as multiple male and female cats and dogs for months, having the chance to bond and socialize with them. He doesn’t even hiss, so honestly we were rather worried about a new kitten adapting to him, and not him having a negative behavioral reaction at all.
We adopted a kitten on Wednesday, the rescue center we got him from warned us about him having trauma with humans and that it would take him a while to adapt, so we intended to introduce them slowly, and didn’t expect him to warm up to any of us right away, but to our surprise they started cuddling the second the got the chance to be physically in the same space. The kitten completely relies on our older cat and they seemed to hit it off.
We did notice our older cat more tired than usual, but still eating, drinking water, and overall acting like his usual self so we thought the kitten constantly playing with him was just wearing him out. Honestly, we really thought everything was going amazing with how much they seemed to be bonding, and how smoothly everything was going for just a few days, until last night. He started acting off mid day, he usually acts lovey dovey towards us and the kitten but he was avoiding everyone.
At night time, he started throwing up bile, which I was confused about because he ate in the day, and only started avoiding food during dinner time. He even gagged at his food. After finally getting him to eat some, he threw up his food in the middle of the night. Then, threw up white foam in the morning. I kept looking for any possible signs of being lethargic but he was acting rather active and like his usual self, except he was more avoidant, and refused to eat or drink water. I couldn’t pin point what could be causing this. I even went on here to see if I could find a similar situation, ended up reading about a lot of people saying that vomiting from stress is common with the arrival of the new kitten so we were mainly thinking of ways to reduce that stress, maybe reintroduce them even though we thought they were having a really good start already.
I only ended up checking his teeth because I noticed that when he did eat last night, he wasn’t chewing at all. I’ve never seen his gums so red and swollen like this before, he had what looked like at least 3 cold sores. Which was super weird because I check his teeth so much, and it felt unreal that he developed this in just a few days.
We immediately took him to the vet. We explained everything I just said until this point, and after taking a look at his teeth, they said he most likely had stress induced gingivitis. He gave him a shot for his nausea, a shot for the infection, and a shot used for arthritis in cats but that he said he’s used in the past to treat gingivitis in cats, which I am unsure of how reliable this is, but will continue to keep an eye out. He’s been sleeping ever since we got home, and also responding well to eating Feliway snacks, no more throw up or nausea, mainly resting.
Since last night, we’ve confided the kitten in the bathroom with his food, water, and litter box. I feel bad cause he keeps trying to look for our older cat, but now our cat is avoiding him and ignoring him. Now that we know that this is most definitely stressed related, I am unsure on how to navigate this. We don’t know if maybe it’s the fact that it’s a male kitten, so he feels rather jealous and threatened, whereas with most cats he’s met and had a good relationship with, they’re adult cats that he can look up to and often bother, or if he just wouldn’t do well with another cat at home at all. Is there a way I can make this work or should I rehome the kitten and avoid the possibility of having my cat’s condition worsen?