We moved all the chickens in to there new pen. The 4 abntams that we had from the year before and all the newbies that we got this year. Now here is the problem the millie flur roo keeps attacking anyone who comes into the coop (the coop is 30 feet by 10 and 6 foot tall.) even when I bringing in cottage cheese he goes after me. any ideas on this and what to do about him. he never did this in there small pen or when we lat him out to free range.