I have noticed alot of square roost post...( that's what some pictures look like anyway)
I honestly wouldn't have thought that they would be used.
Tell me your thought on square vs round post.
What do you use?
Then sand them down or angle cut them with a skill saw, but honestly it doesn't hurt their feet because they sit flat on them. A lot more comfortable than frost bright on the toes! That's the purpose of the 2x4's in cold climates. They can cover all their toes on a flat roost by sitting on them.
Chickens can't grip things with their toes the way parrots and other perching birds can. Their feet are more suited to walking on the ground.
I use several different types of roosts: the flat board ones, but I do plane down the edges and sand them smooth, and natural tree branches, but I pick ones that are wider than the width of our chickens' feet.