Can I use a 2x4 or should we use 2x2? We currently have two 2x4 roosts in the coop (our birds don't roost yet, they still sleep on the floor at 8 weeks old!) that the birds fly up onto off and on....and they are getting covered in poop. I'm wondering if 2x4 is too wide? I wanted their feet to be comfortable and warm in the winter....that was my main reason for using 2x4s.