I have adopted a wandering Buff Brahma. She free ranges. She is our only chicken. Do chickens get enough food free ranging? We have bought laying pellets, oyster shell, grit, and crushed pellets. She doesn't eat those since she is free ranging. What next? We also give her bananas, tomatoes which she loves. Also, how warm should we keep her coop? Is 40 degrees warm enough when it gets below zero? I live in Wyoming.