i used to use a tree stake about 6 inches around for the girls to roost on. I then heard that a 2 X 4 on its wide side was better for them (kept their feet warmer in the winter) so i switched to that last winter. This year i added a 2 X 12 for an access to the roosts (again in its flat wide side). They roost on the 2 X 4's ok, but i have heard that they prefer the round roost because it conforms to their feet better. What's your choice? Is one better than the other?