These ladies are our chicken protectors! At one time we were losing a chicken about every other night – it would be partially eaten in the coop overnight. Nothing too big could get in the building, so we are guessing unless some animal learned to unlatch the door, it was most likely a mink or weasel.
A neighbor suggested to get a goose, since the geese are fairly alarmist when it comes to new creatures in their space. So we did, and whether by luck or design – we have not lost a single chicken to predation overnight since the geese have arrived.