scratch & peck

Hi, I've been using Kalmbach's 20% Flock Feed for my laying silkie hens but wanted to switch onto the Scratch and Peck 18% Layer feed for fermenting so I was wondering, if I should take any precautions and notes when switching the feed? Anybody have any health problems that occurred when...

I have been fermenting scratch and peck feed the past 4 months and am unsure if the white stuff on top of the feed is mold or is harmful to their health. It smells normal (like beer kind of, that fermented barley smell). Please see photos attached.

Aloha! Writing from the Big Island of Hawaii. I have been considering switching from Nutrena to Scratch & Peck. The issue is, no one carries Scratch & Peck in Hawaii. In order to get Scratch & Peck to the Big Island, I would have to create a wholesale account with them, order a ton at a time...