We started out with 31 chickens ( Buff Orpingtons, Production Reds, and Black Austrlorp) Some didn't make it so we were down to about 28. About a week ago we started noticing that we were missing some of the buffs, and some reds.... then a couple days later we were down to 3 buffs. We have no idea what's happening to them, one randomly showed up back in the coop so we now have 4. What type of predator would come in during the day or snatch them up??? Please help??????