I've had 2 drakes for 8 months now since they hatched and they have always been the best of friends. However, 2 months ago my younger drake (a Pekin at 7 months old) started getting very aggressive and now he attacks my oldest (a Muscovy) every time they see each other. I can't keep them together at all any more how do I get my Pekin to be nice, or is this because mating season is coming? Also my gf has a female Muscovy that attacks all animals except for my Muscovy. She does peck his beak a little bit every now and then but has stopped for 2 weeks now. My Pekin tried mating with her and was successful, but now the female trys attacking my Pekin every time they go in the pond. Then my male Muscovy gets along with every living thing and insists on going over to the Pekin knowing he pecks him every time. What can I do to get all the ducks to like each other again?