I have a questions concerning some strange behavior, maybe not but I don't know anything about baby chicks behavior. I have 16 chicks that are 16 days old and four of them have been acting strangely since they were about 8 days old. They run up to each other and bump their chests into each other all the while they are standing on their toes and looking sideways at each other. After they stop bumping into each other they just stand there on their toes, looking sideways, and appearing to have a staring contest. Are they roosters or is this just typical bayb playing behavior? The only reason I am not writing it off to playing is that it is only the four of them doing this, and they only do it to one of the other three. Thanks