My modest experience would lead me to go with American leghorns. They are the most hardy domesticated birds that I have ever raised. They actually make me feel like they absolutely could do without me. We use leghorns to teach other chickens to free range as not all chickens are created with equal foraging IQ it seems
Leghorns readily roost in trees...very high away from predators...one of the most flighty birds for sure. I have also seen them on a native reservation where they were completely free and saw a hen with a few adolescent chicks following her. God bless everyone
