My duck is hatching her first clutch of eggs today and the father is in there with them. The first two ducklings out were fine and looked healthy earlier today but I just found them dead outside of the nest. Mom is still on the nest with the other eggs and hatchlings. The two dead ones both head big open wounds on the back of their heads. Looks like the work of an angry mallard. We only have one male duck and he's been so set on protecting his mate and her nest so we let him stay. We've already removed him though because I'm pretty sure it's him. Did we make a mistake letting him be with the babies?