My family has a small flock of chickens, who roost in trees at night. Some of our chickens will come down when we call them, but the rest won't come down and stay in the trees until morning. We try to get the chickens back in the coop every night, but yesterday, I came out (just a tiny bit before it was completely dark) to discover that one of our chickens was eaten by raccoons . Now, all of the chickens are too afraid to come down, and we've tried putting food on the ground, calling their names, shaking the branch with a rake and that kind of stuff. Any ideas?