We had a total of 8 chicks, of varying breeds and ages. The younger three were about 2 months old, and we had recently started letting them out into the yard some during the day with the bigger chicks. Well, we didn't keep a close enough eye on them all today, and found one dead chick and one mess of feathers was all that was remaining of another chick. The dead chick was laying out in the yard, bloody head, but not eaten. I'm not sure if it was a cat or what. Our dogs were not in the yard, and our yard is surrounded by six-foot fencing all around, so something had to get over to get to the chicks. Whatever it was, it was quiet, because we had all the windows open and were in and out of the house while the chicks were out in the yard, and we didn't hear a thing. Fortunately, our five older chicks made it back into the run, and the last little one managed to escape somehow and was wandering outside our fence (there are a couple of gaps she could have sneaked through.) She has now been named "Lucky" since she is the last survivor of that group of chicks. Any ideas about what attacked our chickens? Thanks!