I have a 4 inch deep container outside of the duck enclosure and sometimes when they freerange one of them will go in it and, clean themselves? She goes foward in the water, like diving kind of, and twirls and goes kinda crazy in it. One time she stumbled out of the container and was on her back like a turtle and trying to get up. I'm worried. They're not hurting themselves when they do this right? Louis and Vuitton have deeper water too..