Ok so I have 5 ducks and I had 11 chickens, they were around 6-9 weeks old, maybe older. When they were smaller I would lock them up at night in a wooden chicken coop it was likea large wooden room. Across the front opening there was a peice of chicken wire that was about 3 feet tall and probally 8 feet long. The opening to the chicken coop was 8 ft across and probally 5 feet tall. Every night I would put my chickens in there, but for the past few days I have been leaving it open so they could go in and out at night. At first I would leave a flood light on in the chicken coop, but for the past 2-3 nights I have been turning it off. I fed them last night and they were all fine. This morning I go out there to feed them again and my ducks are fine, but 1 chicken is dead with its head ripped off and 9 of them are missing. 1 chicken is still living though and appears fine. I really dont know what to make of it. And my chicken pen has 5 1/2 feet to 6 feet tall fencing around the chicken coop with absolutely no holes anywhere in the pen. I have no clues what animal could have done this. My neighborhood is farely populated we have neighbors right up agaisnt each side of my house. Behind my house is a vineyard and a large field. I have seen hawks and vultures and owls. I have never seen a raccoon here and I have seen one possum in the past 9 years. I have also seen a fox before.