A lot of the grain fed to cows is distillers grain [1] and brewer's spent grain [2], which is basically industrial waste that would otherwise go to compost. [1

A lot of the grain fed to cows is distillers grain [1] and brewer's spent grain [2], which is basically industrial waste that would otherwise go to compost. [1] https://en.wikipedia.org/wiki/Distillers_grains https://en.wikipedia.org/wiki/Distillers_grains [2] https://en.wikipedia.org/wiki/Brewer%27s_spent_grain https://en.wikipedia.org/wiki/Brewer%27s_spent_grain