I have a small flock of 4 Isa browns, about 6 months old. Yesterday I was given 2 more chooks (white ones, don't know what breed). They are older than my flock, but smaller. I put them in together, and things seemed to be going OK. However now the old flock are bullying and pecking the new guys, and not letting them move about at all. It seems to be both one-on-one, and the whole group against one. I know they need to re-establish the pecking order, but how long should I expect this behavior to continue? I can't tell if it's one main chook instigating the attacks, but if it looks like it is should I pull her out for a day or two? She would have to go into a very small cage if I do. Any suggestions would be great