He keeps on picking on one duck that had surgery on her foot but is better now. I have kept him away from all of the other ducks for several days... and he still remembers that she is the one to pick on... I thought he would forget about it after a while. He mates with her repeatedly and her neck gets all torn up. She gets along fine with the other girls... and he gets along fine with the other girls... but I can't keep him with the girls because he picks on her. I like him, but am really getting kind of tired of having to keep them apart. If anyone has any ideas that would help please let me know. She is such a sweetie - getting rid of her is not an option. I don't want to get rid of him either as I need him to fertilize the eggs in the spring for hatching in my classroom. He is a very pretty blue runner too.