I think if they are not used to be out all the time that they will stay close to the other chickens and close to the pen. Mine are out often but do not stray far away at all. Just work with them alot while they are young to keep them tame and I dont think you will have this issue. My liitle rooster thinks he is a person and flogs me now. God forbid I pick up his hen. It's like being attacked by a pigeon. If you clip wings you will loose the dropped wing look. Won't look much like a serama.