I had a hawk get a broody hen. I set her eggs under a broody game hen hoping she would hang around the few extra days to hatch them. She did not. The game hen was in my main coop and another hen decided to set on the abandoned eggs at night. It seems that if my wyandottes see/hears chicks they try to take them or go broody. Since it has been in the mid 90's they just hatched last night!