Birds don't automatically mate. And if they start laying fertilized eggs, there's always lupron.At some point they will want to have a mate, so far I had only one not part of the siblings she quickly put dibs on him they have a separate cage, the new kids when ever they hear sunshine that wants nothing to do with them they go nuts , so I'm guessing a few girls in the middle of the five looking for a mate. And that is how you end up with 11 birds, I heard someone else ended up with 400. I need to be careful, have two bounded pairs .