Not educational obviously, but not sure what other phrase to use.
I mean a cat who is significantly below average performance mentally
We've got two kittens recently and they're both gorgeous. One of them was definitely the runt of the litter and he just doesn't play in the same normal way his sister does. He wanders around and then just sits and stares kinda vacantly. He's very placid and eg doesn't play fight back when she pounces on him. I don't think I've ever really seen him 'play'. Though having said that I think he was just this second playing with his sister's tail, but that's honestly the first time.
He doesn't bury his plops in the litter, she does. He wanders off regularly during dinner, she doesn't.
He is noticeably smaller (just 650g to her 1000) at nearly 12 weeks. They got a sniffle and had a temp last week which they're both just recovering from.
The charity which rehomed then to us assure us the vet gave him a clean bill of health, though the foster worker thinks he's got a different dad from the rest of the litter and might have been premature, he looks different from the rest of them.
Is this a thing in cats?