I brought two of my beloved females over to a friends house. (She also has ducks) and we set them into her huge pen. Immediately, Harrison, a feisty Rouen duck, mated with one of my females (who is a runner.) Do you think this will produce healthy babies? I didn't want it to happen in the first place, but I wasn't paying close enough attention. I watched them to make sure he didn't mate with my other duck. Anyway, tell me what you think. I'm a little concerned.