I have a group of nearly 10 week olds outside, unfortunately 2 of them are roos and need rehoming. This will leave a lone hen. Inside I have a group that are almost 6 weeks and need to go out soon, this is also a group of 2 roos and a hen. When I rehome the 2 roos outside, will I be able to straight away put the younger 2 roos and younger hen in with the one older lone hen outside? If not, how can I make it work? As the youngest roos I am keeping and I don't want the older hen to be on her own as she never has been.