We have had our 5 ducklings for about 3 weeks now. They are all mixed breeds. And absolulty adorable!! We wanted to start raising them to show our kids a little bit of farm life. We were hoping to get all females but when we went to the farm to pick them out we were told there was no way of telling until their tail feathers come in. Well one has gotten tail feathers and I still can't tell. Can someone help me tell if Disco is a boy of girl?