I have 2 female Pekin ducks. They are about 2 years old and they have free run of the backyard, a pond, toys, food, shade, and seem happy... most of the time. I've noticed recently that my one duck is bullying the other when it comes to sharing food. I give them lettuce and melon in the morning and the one will run the other one off from the treats. The bully doesn't want the food, she just doesn't want the other to have it. The rest of the time they are inseperable. Any ideas?