I have 22 Rhode Island Red chicks. They are 2 weeks old and are in the same brooder I used for my 20 mixed flock chicks who are now grown. They have clean water and bedding, they have plenty of food and heat and an area to get away from the heat if they would like. They keep smashing each other. It seems like the bigger ones just sit on the smaller ones. Most of them the are spread out and a few are out of the lamp area so I don't think its a heat issue. They have killed 2 already by smashing them. We made the brooder bigger, thinking there is not enough space but they keep piling up. I don't want to loose anymore but I am not sure what to do other than put a 3 or 4 in smaller brooders but then I don't have enough lamps, feeders and waterers. Does anyone have any ideas on why they are doing this? The bigger ones just seem like bullies. They are straight run and my husband thinks it could be the little roos but I see it more in the larger birds. Thanks in advance of any and all advice.