This is my first year with flying mallards. I have 16 birds, 7 hens and 9 drakes that are now 5 months old. They are in an enclosed pen 20'X20' with a small pool. All has gone well until the past couple of days. I now have 2 of the drakes that don't get along and are fighting. Is this normal during non mating season and will they over come this or fight to death. I'm thinking about maybe letting one of them out of the pen and see if he stays close to the others, or will he just fly away. Sure could use a little advise. Thanks