I have two flocks, two coops. They intermingle during free ranging. Sometimes the big girls check out the younger flocks coop, especially because the food taste soooooo much better in there (same dang food
), but they have never used the younger birds nestboxes. The younger birds are always invading the older birds coop, particularly to raid the feeders because the food is soooo much better there (yep, same dang food
). The only difference is, my younger hens will occaisonally use the older hens nestboxes. Guess what? The nestboxes are identical too. Same style, same nesting material, same brand of golf balls even.
Come nighttime every one is in the coop they are used to, the one they grew up in.
I'm about to face a big problem as I move one of my young cockerels from the coop he was hatched in to my other coop, to replace my older roo. I'm sure he will have to be hand carried to the coop each night and locked in to keep him from returning to the coop he's always known as home; at least until his little brain is retrained.