Lots of good info there, but I noticed that it says not to feed medicated feed, and that is a myth.https://thehappiestduck.wordpress.com/2018/05/09/feed-and-supplements-for-ducks/
I shop at TSC and it is not the cheapest. I would find a local feed store to find a cheaper feed.

This thread will explain why:
https://www.backyardchickens.com/th...dicated-feed-the-myths-and-the-truth.1247838/