As the title says, I am a little concerned. I have two WH ducklings, six days old. Twice in the past 24 hours, the littler of the two has started hollering, and when I came in, she was on her back flailing. Once righted, both times she was tired but recovered quickly. I am positive it was the same duckling both times. I've raised ducklings before and never had this problem. The only other symptom they seem to have is that they sneeze A LOT. But no eye or nostril discharge. I did put them on paper towels instead of pine shavings, thinking maybe they were too dusty. The ducklings are active, eating/drinking/pooping well and walk/run around the brooder fine. Anything I can do? Should I be worried?