Ok they are young 15 week olds and 11 week olds but they're not small, you'd thought I was asking them to balance on a tight rope!!! I have 3 levels of perches 2x4 wide part flat so they have plenty of room. They flop around and fall off, pile on top of each other then fall off and some of them have to "figure out" how to even jump up on the first perch...DUH. I spend (well too much time) helping them realize they like the perches.