If anyone ever tells you that cats will not harm a full grown hen please send them to talk to me. Today was the second time in two years I have lost hens to neighbors cats. This time it was a white ameraucana hen. I know it was the cat because I was about 300 ft from the coop when it happened. Literally tore her neck apart after jumping on her. Last year it was two Orpingtons three days apart. Caught that cat in the act and pierced its ears with and arrow.