The 12 pullets are 8 weeks and have been using the "big girl" roosts now for over a week. They seem to want to fight over the end positions. I have two roosts that are about 30" high 6' long and parallel. There is plenty of room. Some try to step over, under, on others to get where they want. Sometimes they get knocked down to the poop board a foot below. This goes on for 15 to 20 minutes or so. I have them on a red 40 watt bulb to try to wean them off the light. Is it going to get better or is this normal behavior?