I need to know how much is a fair price for a 10 Month old AustralOrp hen? I have 7 Lorpie girls, and I know someone who wants an already grown up hen to mix with her younger chickens. (hatched early Thanksgiving week or the week before, so they're slightly over 2 mo. old). I'm not sure she'd be happy w/ the age differences. Would having just 1 grownup w/ them be ok? Would she be better off w/ 2 or with none at all, or getting chicks later this spring?