A month ago I hatched 20 eggs in an incubator from fertile eggs I collected from my adult hens. I tried initially to allow one of the hens to hatch the eggs but before they could have she kicked them all over the floor of the coop and broke many. I wound up hatching 20 Chicks from fertile eggs from these hens. Now the babies are a month old and I made a run inside the big run where the adults are. I just found one of the babies with its tail ripped off..dead. looks like a hen grabbed it through the wire. Another chick was injured but seems ok. Is this normal?