On Saturday we found one of our Easter eggers on top of one of our Speckled Sussex pecking her on her back. When we got closer and investigated the damage, we found an horrific scene. Her vertebrae was exposed and parts of her guts too! Poor thing was still alive. We could not believe our eyes. We immediately took action, and put her out of her misery. I understand that these things sometimes happen, especially when a chicken is injured. But ours was not, and our chickens are not aggressive. What makes it more odd is that we had just left them out for their run to free range less then an hour before the incident. We wonder why our speckled did not try to escape, she was not cornered and there was only one after her. All the other chickens were no where near them. In fact we found two of our chicks hiding under our coop. The only thing we can think of is perhaps an animal tried to attack her and was unsuccessful. When our easter egger saw that she was injured decided to take maters in her own hands. Has a similar incident ever happened to you? We feel horrible and just want to make sure this never happens again. Any feedback would be greatly appreciated!!!