I only had 13 hens in a big coup, I was trying to start a flock with a small amount then slowly build with the chicks they have, and 2 of them killed all the others in less than a week, I only have those 2 left, has anyone had anything like this, they had hay, perches, scratch grains on the ground and food in a feeder, water everything heck they hadn't even gotten old enough to start laying eggs tho it should've happened any day now, I just want to know how to prevent this in the future and to understand what happened