Of course. He wouldn't have thought otherwise. In fact, the first thing he does after putting the tray down and waiting the requisite amount of time that is polite to be invited into his brother's living quarters, is to go pick up the rabbits to pet them.

He doesn't have to pretend to be too cool to like rabbits, with Xichen. And obviously someone needs to feed them! He'll do so happily. "Have they given you more gifts? Your room will end up like the back mountain."