Though I have had chickens in the past, they have all been six months old and older, so I was not aware of the dangers of cats to young chicks! I found this out when I caught my neighbor's cat in the chicken pen. It has a 8 foot high fence, but the cat went from a tree onto the coop house, then into the chicken run. Luckily the girls were okay. I built a chicken tractor with enclosed pen for the young ones I just got, but eventually want to move them over to the big coop. Everyone gets locked up at night; it is just during the day they are out. A cat would not attack a full grown chicken right? Anyone else have a chicken-chasing kitty in their neighborhood?