Aw, man! That's a bummer! My girls love that stuff. It sounds like you're doing everything right. Here's what I do, FWIW. Seems a lil different:
I use half gallon mason jars. I have 8 grown birds, so I use 2 cups of feed. I add enough water to cover and then some. The mixture of feed and water comes to about 4 1/2 cups. I close it up. It sits for 3 days (getting shaken up a few times daily, of course). On the third day, I dump it into a bucket. I think the directions say to drain it, but I don't. I add organic pellet from a local mill to it until it becomes a mash. I add a bit of feather conditioner supplement and feed it to them on plates. It does smell funny, but it's a sweet, yeasty smell. And my flock is super spoiled. I also ferment it with dried marigold (for yolk color) and occasionally add shrimp flakes just before dishing it out.
What you might do is just mix it with regular crumbles and add water so that they don't just pick out bits and they get all the nutritiony stuff (without the fermenting process). Then you can just transition to the new pellets (wet or dry) when the Scratch & Peck is gone. There are powdered probiotics you can add, if you want to try that.
