Here is the best guide (lifted from @lazy gardener ) for fermenting. It really is simple and I keep a half gallon jar on my counter for my six chix. That is about three days worth before I refill, there is always a bit left in the bottom for backslopping (like a cup or two)...
In fact this is not an either-or question.
I suggest you rethink the either-or approach.
If there WERE only one option, it would be fermenting.
I suggest you can do a multitude of options.
Here is an approach I use:
1. Ferment the feed. Yum.
2. Do sprouts if you like.
3. Start a...