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. Last night, we saw that one of them was limping. After watching him/her, it was as if he wanted to move forward but could only move one leg and so he ended up going in circles. We separated him out into its own 2x5 bin with clean shavings, fresh food, and fresh water. It settled down after about an hour. Before that, it sounded like he kept circling in his bin as if he was unable to get comfortable. No real difference this morning. What can we do? Does it sound like a broken leg?