I'm getting some Silkies and Indian Runners soon. I plan to raise them all in the same brooder, but I have a question regarding niacin. I know that ducks require more niacin than chicks, so how would I go about making sure that the ducklings get enough without harming the chicks? Also, I've heard that mixing Brewer's yeast in with all-purpose feed will work, but how much should I put in the feed if I'm going to be giving it to everyone? Also, I'm new here, so let me introduce myself I'll just go by Snow Goose to keep things simple. I'm an 18 year old girl and I current;y have a flock of 2 Toulouse and 4 Golden 300 Hybrids (from Metzer Farms). They're all female and will begin laying in about a month or so. Pleasure to meet you all.