I had our Muscovy duck hatch 13 ducklings. I moved them into the brooder and over the last 12 hours I have lost three. I'm very concerned at this point and would love some community input. The ones that are passing away are lethargic, mostly stay under the heat lamp and slowly pass away. 1. Is it normal to lose a few in the 24-36 hours after hatch? 2. Would they be better off with their mother?