There are so many predators, especially those that target chickens and baby chicks.
At my old place, I had watched blue jays attack and drive away snakes. I just watched a flock of crows (that would technically be “murder of crows” wouldn’t it?) … anyway, I just watched a bunch of them team up to chase a very determined hawk away from my chicken yard! The hawk tried several times to return, but each time the crows gave chase, and one in particular screeched and dive-bombed the hawk mid-air. I came in to get my camera, but apparently the crows were finally victorious, since the hawk hasn’t returned again.
Predators are by far the biggest threat to my poultry. Crows will take tiny baby chicks (then again almost ANYTHING is a predator of tiny chicks!) but they don’t bother them once they are a few weeks old. Hawks on the other hand will attack even adult chickens, and frequently go after my half-grown ones and smaller adults. So this time, I have to cheer for the crows and be thankful that they apparently have a nest or something worth protecting near my chicken yard. Now I’ll just have to keep those babies locked up carefully (which I try to do for as long as I can anyway).