I have a father-son duo of Magpie ducks. father is 3, son is 2. -- mom died last summer. due to winter, they are in with my chickens; they're terrorizing my hens. As soon as the snow melts, they're going to another pen permentantly.I'm wondering if I should get another female or two as company. but I don't want to invest in females if the boys will only be around for another year or so.