How much hay do jersey cows eat?

Answer

The short answer is it depends on the size of the cow, if it's lactating, pregnant, the quality of the hay, etc.

(Last answer said that they fed cows grain. Grain is NOT grass, cows are rudiments, grain lowers the PH levels of their stomach, causes bad tasting milk and lackluster health of the cow, generally used as a cheaper alternative, or to fatten a cow, in large scale production. Not recommended)