You probably don't want to make fermented feed the way I do, at least not right away. My recipe/method is a bit more complicated than most and requires as special starter. Actually, no starter is required to make basic fermented feed, but I have reason to believe that the starter I use produces a higher quality (aka, improved nutrition) fermented feed.
Here's a basic recipe to get you started:
For a 5 gallon bucket batch:
You'll need:
* Three 5 gallon buckets, one with a lid
* 4-5 cabbage leaves
* Non-chlorinated water
* 1/2 cup blackstrap molasses (optional)
* A 4-5 foot long stick to stir with, or use your hands
1. Take the three buckets and fill one 3/4 full of feed, another 2/3 full of water and leave the third one empty.
2. Scoop some feed from the one bucket into the empty one and add a bunch of water and stir well.
3. Dissolve the molasses in some hot water and add to the mixture.
4. Keep adding feed and water, stirring thoroughly, making sure it's not so thick you can't stir it.
5. Stir in the cabbage leaves, one at a time.
6. It will absorb quite a bit of water, so keep adding water and stirring for a few more minutes. It should stir a bit like slightly runny oatmeal...it will thicken up with time. You may or may not use the whole bucket (or may need more) of water depending upon the absorbancy of your feed.
7. Put the lid on, tight or not (it's a great debate, I usually do a tight lid) and place someplace you don't mind it possibly overflowing sticky fermented mess, such as an unused shower or outside of the weather is above 60F during the day.
You can start using it right away, if you wish. It is unlikely to go "bad". Most failures of fermenting things has to do with poor water, usually chlorinated water. If you have chlorinated water, call your city water supply and ask what they use to chlorinate it with and do a google search for how to remove said chemical from your water.
After you've tried this for a while and want to try my recipe, PM me with your email addy and I'll send you a small pdf book I wrote on it.