I have 13 9 week old pullets. So far they were brooded and raised in one coop. They are getting big enough that some of them need to be moved to our second coop. Our original plan was to position both (theoretically mobile, in practice extremely difficult to move) coops close to each other and have a unified run. But now we are thinking of how to put the chickens to work clearing land that we want for a new garden in the spring. If we split them into two groups, and have them in two separate areas, far enough apart that they may only see glimpses of each other and only hear if someone is making a lot of noise, at what point will they forget their pecking order and become difficult to re-integrate if we later, for simplicity or other uses, want to put the coops close together again?