3 weeks ago a hawk attacked and killed one of my hens while they were free-ranging. The first few days the remaining 8 were very skittish. I have kept them in their large enclosed run (15 ft x 6 ft) attached to their coop. Not one egg since the attack! Yes, a few are molting but the others aren't. Have they been scared out of laying? Can that happen? The first few days I wasn't concerned but now I am getting worried.