8 ducklings hatched under mama duck on Wednesday. They have all been very active and eating their parents pellets that we've crushed up(Purina Layena blue bag). They have been waddling all over with mama right with them. Daddy guards the door to the pen and sometimes scoots the ducklings under the coop when people walk too close. Before church Sunday(today), we noticed that one duckling was by itself and not moving. We have it inside in a box with food and water. It does not seem to want to eat or drink. It can move its head and wings just fine. It just seems to be the feet that can't move. It's as if they are limp or paralyzed. All the other ducklings are fine. Does this sound familiar to anyone? We are not sure if it may have gotten trampled or something, but we only have two ducks, one drake, and the eight ducklings in the yard... which is completely enclosed even on top. Can anyone help us out?