I am getting two Pekin ducks. I am planning on giving them my chicken layer feed with supplemented Brewers Yeast, but it has a lot of corn in it. I read that corn is extremely fattening to ducks, and that if they become overweight, their keel hangs down and even if they lose weight, it will always be there. So here is my question, can i feed them the layer without having to worry or do they need some other feed? I read you can feed layer to ducks, I'm just don't know about the corn.