Hello, I have 21 new baby chicks. I know the basics like food, water, heat. I keep their area really clean. I had 10 chickens in the past that I raised from chicks to almost full grown till something got in my coop and killed everyone one of them. But these new chicks are doing a few things the other chicks didn't due that I don't know if it's normal. One thing is my youngest chicks are trying to get under the older chicks. Is that normal behavior? Second my olderror chicks are rolling around and trying to throw their food that dumpsychological out on to them selves. Again my last chicks didn't do theverything things any advice would help.