I put my 5 three week old chicks in their temporary outdoor pen this morning. It is attached to the chicken run so that everyone can get used to each other before they join the big chickens in a week or two. I go out for a few hours and when I came back they were gone! I eventually recovered three, they were under the coop, but two are unaccounted for. Did a hawk get them? Will they come back? I can't find them anywhere. What do you think happened to them?