Novice Karate Group (ages 8 & up)

Fermentation has been used in food production for centuries, but I'm seeing it mentioned more often in discussions around animal feed as well.

Some people suggest it may help with feed utilization and overall nutrition, while others point out that results can depend on the ingredient, production method, and animal species involved.

I'm curious whether anyone here has practical experience with fermented feed ingredients. Are they being used more widely today than they were a few years ago, or is adoption still relatively limited?