No not a variation on suckling pig (though i'd consider it)... but the strange habits of Macavity.
He is a neutered three year old cat, born here and I still have his mother, Twinkle. Not weaned until he was about 3 months old.
He's a feisty tough cat, but he suckles on Misty, my three year old working cocker spaniel and has done since he was a kitten.
They are not particularly close, but every day he comes for his suckle, during which she cleans his bum like he's a puppy.
She's had one litter, they weren't weaned young, he wasn't weaned young (he still lives with his Mother ffs!), I thought this was quite common but having looked at t'internet,,,, it seems rare. No harm is being done to either of them.
Have you lot heard of this with a cat so old?