Thread:Knj00/@comment-5089372-20121011015601/@comment-4830404-20121011033417

Second nest is a requirement to prevent backup from different breeding times.

Further nests are luxuries and not worth it. I've been in the position to save 500 gold for the third nest for a while but I never do it because I can usually control what I breed such that I won't back up the nursery with 2 nests.