I have a pair of African Geese which I got as day old chicks in July 2013. They are supposed to be a pair (male & female) and display physical and temperamental differences such as being larger, different vocals, one is more aggressive, etc. However I still have not gotten an egg from them. I feel like I should have seen a few eggs this past spring, and certainly by now. Is this unusual, or should I be more patient? Is it possible I have two males? Thanks!