I found 15 dead Chukar in my pen; 2 had been eaten (one, the head only) but everything else was just dead. No obvious marks on them, no blood on them. The pen is welded wire bottom half and the top is netting. There is a hole in the top of the netting (~12 feet in the air) but I don't see any other holes anywhere. We've had our share of coons break in but they only kill a couple at a time, this all happened overnight. Any ideas, and if so, suggestions for trapping???