I had 5 healthy ducks. One quit walking, its as if its leggs are too weak. Now today another one is doing the same thing. I have to be doing something wrong for them to be fine and then stop walking. Please if anyone has any ideas let me know. They are 2 weeks old, eating turkey starter, they have a fairly big tub they are in and I try to take them out for at leat 30 minutes a day to run and play on the grass (although they dont do much moving.) Thanks for any help.