Hi. We have 4 ducklings that we picked up from our local TSC about 3 weeks ago. We have had them together in a 2x5 (?) bin. Tonight, we saw that one of them was limping. After watching him/her, it wasn't really able to walk but would rather limp and go around in circles as if it could only use the one leg. We separated him/her out into its own 2x5 bin with clean shavings, fresh food, and fresh water. It doesn't seem to be able to settle down. It sounds like it keeps circling in its bin. I am listening at the door so as not to cause any excitement. What can we do? Does it sound like a broken leg? Will it be ok until the morning?