Hi, I am a first time duckling mum and I have a question about food. I understand that ducklings need 20 - 22% protein levels in their food for the first 3 weeks. However the only non medicated chick crumbs i can find are all 19% protein, is this ok or do I need to add something to get the protein up to 20 - 22%. I know I need to add Niacin and have brewers yeast to do this, but that doesn't affect protein levels does it? Thanks for any help.