I read through the threads about adding a new member to the flock. I have five 12 week old buff orpingtons in a rather large coop with an additional 25x30 run. There is a very sweet hen at the local shelter and I was wondering if it would be easier to add an older bird to a young crowd vs the other way around. Space is definitely not an issue. Anyone have any thoughts on this? I would welcome the advice, as I really don't want to upset the flock..happy critters, but would like to adopt the hen.Thank you in advance.