I thought it was a hawk picking off my babies but yesterday I caught the little devil attacking one of my silkies! I have locked up all the chickens and set traps around the run. Where theres one is there more? If I get it is it safe to let them out? Is there anyway to prevent this from happening again? My chicken run is 30'x40' and the top is covered with netting but these little stinkers are so small I don't know how I could completely keep them out. Thank you for any words of wisdom.