How do I introduce new ducks into my flock?
Normally you can put them together and within a few days, they are fully integrated. But you should watch them initially. The alpha duck may be aggressive,
especially during the spring and summer mating season. If the fighting is excessive, separate the newcomer but keep the pens beside each other so they can
get used to each other without fighting. If you are trying to integrate an aggressive duck with a non-aggressive duck, put the aggressive duck in the non-aggressive
duck's pen. Then at least the non-aggressive duck has the home field advantage!