I have or had 6 RIR hens that are about 6 months old and just started to lay 2 weeks ago. One of my hens was a runt, she didn't grow a comb, had no Waddles and no tail feathers. She was the most docile bird of the bunch. She was my favorite. When I got home today I found her dead, she was pecked to death. I picked RIR because of everything that I read about them is that they were docile and good layers but they really aren't docile. The one head hen can be mean and will peck at me. Did I do something wrong by treating her differently? Or is this normal because she never matured?