I have not lost a single chicken to "anything" in 2 years! Oh I forgot I rescued a siberian husky and it liked to kill baby chicks, but never any wild predators. But Today I went out side and about ten feet from the house out by a tree I found a dead fox!!!!!!!! OMG!!!!!! My chickens are completely free range, they roost on the deck and in a pen that is only half built. I wonder why the fox was dead!!???!! And why he didn't bother my chickens??? I have a 5 year old Golden Retriever but he's not the killing type I don't think. I am worried now!!!!! Darn Fox never been so happy to see a "dead" animal!!!! I only have chickens and I just love them.