We all love fermentation!

According to a Hoards article, corn silage takes about 4 months to complete fermentation. Cows milk best on fully fermented silage, so care should be taken to keep it all sealed and secure until completion.

If you've ever had a beer or wine that just tasted wrong. Its probably due to some problem with fermentation. Its the easiest thing to mess up. So the next time you're tempted to skimp on time or materials, just remember that experience with drinking a nasty beer. You wouldn't drink it or serve it to your family, so don't serve nasty silage to your cows.
Here is picture of a 5 gallon batch of beer during its primary fermentation, which takes about two weeks depending upon yeast strain and conditions.