You oh can supplement B vitamins in their water.Oh My!
I am not sure what has happened.
I have been doing some research and figures out that the twisted leg condition is referred to as "perosis" and is caused by a nutritional deficiency of a vitamin named "choline." This vitamin is important in the formation of cartilage that maintains the stability of the hock or ankle joint.
But I still cant figure out how to solve it.
Hope this helps!