I bought my cockatiels from a breeder a year and a half ago, and they were both supposed to be males. A couple of days ago, I found an egg in the cage, and today another one. I have no plans to breed my cockatiels, and I have already ordered some "dummy" eggs to replace the real ones. When is the best time to do that? Replace them one by one as they keep coming? Any other advice? I don't want to separate the birds; they are doing great together. Thank you.