Hello, I have 2 Chocolate Indian Runners. I thought they were both male. I also have a female Aylesbury. Everyday for the last 3 days one of ducks have been laying eggs. I have no idea which one is doing it. Can my ducks cross breed? I am hoping you guys can help. Also my one runner has blue/green tint under its wing and the other has white. They are the same size and it doesn't look like their tails are curled any...