I have a small Mallard female that sat on a nest of eggs for about a month that did not hatch. After she deserted the nest the other ducks that she grew up with now are hostile towards her. She is the only Mallard, the remaining ducks are larger and can not fly. Any suggestions on how to get everyone to get along again. She ends up flying out of the enclosure to get away from the larger Drakes and spends the night outside the enclosure.