Hi, We have two generations of ducks. The first generation (4 ducks) hatched the second generation (10 ducks), but due to a cold snap, we brought the hatchlings inside and raised them in the brooder box, so the big ones didn't get to raise them as their own. Now that the second generation has grown (they are almost 4 months now), we have started letting them outside in the run area with the others. At best, they ignore each other, at worst, the older ducks will charge them, chase them, grab at their feathers, and otherwise attack them. At least it looks like an attack. It's been several weeks now and we are no closer to integration. We pen up the old drake since he is the most aggressive toward the young ones, but still we have to separate little gangs of ducks that don't come near each other except to attack. Should I worry? What should I do? Right now we have to keep them separate when we are not observing them, which means twice the work to maintain two different duck operations.