I have a hobbly duck two were but after changing some stuff up the other is doing much better, but this one seems worse. She (assuming) seems to trip over her own feet and when I pick her up and let her legs hang, they cross. They're about 5 or 6 week old Khaki Campbells. She seems fine otherwise, though she is the smallest of the four. I've had no luck searching for what it might be - it doesn't seem like splayed leg, as they go in not out? I would love to figure out how to help her, this is our first time with ducks.