A sloth. He would be very cuddly and verrryyyyy sllllowww... I would feed him on the top shelf of the closet because Sophie and Pierre would otherwise devour his food
...
Scratch that. It would have to be the ring-tailed lemur, because I realized that there's not much chance of success in toilet training a sloth - he'd never make it there in time.

Do I really want another animal? Maybe not. The apartment would get too messy. Sophie and Pierre are perfect and using the toilet like humans. I'd rather just visit other animals.

But I could have a friend-pet squirrel in the park. Magically, it wouldn't bite and give me rabies when I tie a ribbon around its neck for quick recognition. I would bring it the best squirrel food every day and teach it tricks. I'd make clothes and props for it. Friends and admirers would marvel at my Snow White skilz. Rugs do not enter this equation.