I have no clue what's happening and I'm in a panic. This morning one of my boys suddenly started collapsing. I brought him in and I've given him Vegimite water and peas. He can stand but is shaky but still can't walk and now one of my girls is finding it hard to walk and move. It's like they try but their legs just won't carry them. I've tried finding a vet but no one will look at them. They are both 2 years old. There is no stagnate water source in the yard, their bedding is clean and their pool gets fresh water in it everyday. I have 3 more ducks and 4 chickens and I'm worried they will all start dropping. What is going on?