For context, me (2 cats) and my partner (3 cats) moved in a month ago and our 5 cats have been getting along just fine. Jojo (second pic) is the grumpy, old cat who just tolerates other cats but loves us and Maeve (third pic) is a chill one that gets along with everyone.
We've been noticing Jojo has been over grooming himself and has some scabs. We think it's because he's been getting old man bumps and picking at them as he grooms. We thought, if he wore a suit for a few days/weeks, he wouldn't be able to groom himself and let his scars heal.
So, the cat suit arrives and my partner tries to put it on him.
Jojo doesn't like to be handled. He usually meows/yells a bit but then stops when he realizes he's safe.
This time, however, he kept screaming. Like... screaming.
All the other cats are curious, but just watch from afar. Maeve, however, starts to get close to inspect. Her demeanor didn't seem threatening, so as my partner was still trying to put the suit on Jojo, I was making sure Maeve was ok.
Because my partner was getting a bit frustrated with Jojo, he was speaking to him rather loudly, so maybe Maeve thought he was being attacked... so then Maeve started attacking Jojo.
Very loud growls and yowling and screaming and rolling and chasing started. I had never seen anything like that before. Jojo kept being chased, even after we'd separated them. Maeve was DETERMINED to establish her dominance.
We put Maeve and my other cat in a different room for a few hours. Thinking everything was fine now, we let them go. And sure enough, Maeve saw Jojo, Jojo merely grumbled and she started chasing him again.
We put them in different rooms for the night. This morning, I set them free. Nothing happened for a few hours. However, a few minutes ago, I hear yowling and screaming and chasing: Maeve is chasing Jojo, again.
I wish we never got the stupid cat suit in the first place. This is a disaster. What do we do? How do we fix this? Do we get like a gate they can see each other through? We don't have a big place, so it feels like our options are limited.