Three weeks ago we got 2 mallard ducklings that were 4 weeks old. Two weeks ago we got 1 day old Pekin ducklings. We tried putting all the ducks together but had to separate the ducks since the mallards were being very aggresive toward the Pekins. So we put the Pekins with our 8 chicks and everyone was content. Last weekend our dog killed one of the mallards. We put the single mallard back with the chicks and ducklings but in a dog crate. After a few days we have let her rejoin the community on a trial basis and have let her stay as she is no longer aggressive toward the chicks and ducklings. In fact, the Pekins have begun to follow her around. They forage together, sleep together and seem very content to all be together. If they become separated or cannot see one another they all begin to peep very loudly until the 3 are reunited again. The mallard will occasionally lunge at the chicks but not as aggresively as before and only when they come near the ducklings. Some of the chicks are also very attached to the Pekins and try to snuggle with them often. Now that the Pekins and mallard have bonded will she fly away in the fall?