I have a flock consisting of 4 orpingtons(1boy 3girls), 2 wyandottes(girls) and 3 cream legbars(1boy, 2girls) They're roughly 19 weeks old. My question is, can I add a couple silkies? Or will these breeds bully them? Everyone seems laid back, I can't actually tell the pecking order because they all get along so well. One of the legbars is a runt and noone bothers her, she's half the size she should be.