OK. So my runner ducklings are arriving from Metzerfarm on the 27th. I've been going to feed stores and calling around for the Manna Pro Duck starter/grower. No one seems to carry it down here in the DFW area of Texas, but they carry Manna Pro's Gamerbird/Showbird. I went ahead and bought that. The only problem is that the protein is a little higher(24%) than what is suggested for ducks(21%). I've read in the forum somewhere that rolled oats can be added to decrease the % or protein, and I used the the Metzer calculator to know how much rolled oats to add to bring that down. Q1: I need to do anything with the oats before adding it? Do they need to be ground-up before being weighed then added? Q2: I'm looking over the Mana Pro Gamebird/Showbird and I don't see anything about niacin. I'm assuming that means it needs to be added, correct?