If you are talking about brewers grain or distillers grain, there are a lot of farms that use these for animal feed and there is along history of doing so. If you have access to them then yes.
At one time we had access to brewers grain from a brew pub in Raleigh and my father in law fed them to pigs.
Sadly, the Obama adminstration's USDA is considering new regulations that will require these grains meet the same standards as bagged feeds in order to be fed to livestock. This is of course to prevent disease which they can't site even a single instance of occurring.
Of course then the brewers and distillers will find it cheaper to dump into the land fill and farmers and ranchers will not have access to these cheaper animal feeds.