I'm almost finished with my coop but I need help designing the roost. I keep getting different opinions but not really the info that I need. My question is which roost bar is healthier for my chickens. I read an article that said rounded perches aren't good for hens as they can lead to keel bone deformeties etc... and also foot problems. In other words is a 2x4 with the 4inch up the best option for preventing health problems such as those listed above or what? I want mine to live a very long and happy life. Please help. Thanks and GOD bless you.