I like this article on free ranging by BeeKissed, discussing breeds, too much handling, etc:
https://www.backyardchickens.com/articles/bees-key-points-to-successful-and-safe-free-ranging.65895/
I had a BO that was taken by a coyote. I then decided that the breed is more vulnerable than other breeds. They have been called 'the golden retrievers of the poultry world'. She was more trusting than the other breeds I had, all raised the same way. Handled as chicks, but not as adults.
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