I don't know what is getting them, but that's 3 that I've lost out of 6 of my Snowy Mallard ducklings. It's happening at night when they are locked in the coop. I haven't even found a body so I'm thinking something is eating them. They're with their "Mom"(one of my Black Swedish hen that hatched them). Should I take them away from her and put them in the brooder? They are 2 weeks old.