If all your looking for is the sprouts, you can just use water. I give my hens wheat sprouts all the time. I put them in a pan, covered w/ water. I soak for a day, drain and rinse. Soak for a second day, drain and rinse. Then I just leave them in the pan. You should rinse them everyday at least once. By the 3rd day they are usually starting to sprout. I start feeding them on the 3rd day, sprouted or not. They are usually very swollen and soft by then. My girls love them. I feed it to them in an old 9"x13" pan. When they see me with the pan, they get very exicited. I usually get 4-5 feedings from one batch. By the last day, the sprouts are usually about an 1" long. Sprouts are very nutritious and benificial for their imune system. I have also noticed eggs are a bit larger.
Goodluck! Hope this helps.