The starch and protein digestibility of corn silage change during storage.
"Some of the most rapid changes in starch digestibility are occurring right now," says Ev Thomas with the W.H. Miner Agricultural Research Institute in Chazy, N.Y. "Furthermore, by now your silage may have changed enough to require a ration adjustment. If more of the starch in the silage is digestible, that’s less starch (in the form of corn meal or other grains) that you’ll need to buy. But you won’t know this unless you routinely test your corn silage, including digestibility."
Work with your nutritionist to ensure that your rations represent the quality of what you’re feeding today, not what you were feeding last fall.
Source: Miner Farm Report, April 2012