This is what I meant about the igloo being too small for 3 inseparable hamsters/pillow. They just had their bath and couldn't wait to tuck in. Fur was still wet so I lifted the igloo so they wouldn't catch a cold while sleeping (is that possible?). However, they made a din with the overturned roof and crammed inside the tunnel instead. I had no choice but to let them back in - obstinate, obstinate creatures.