For the farmer who takes care to keep them cool, providing them with high-energy feed, and milking them regularly, Holstein cows are producing an average of 2,275 gallons of milk each year.

(1) providing them with high-energy feed, and milking them regularly, Holstein cows are producing
(2) providing them with high-energy feed, and milked regularly, the Holstein cow produces
(3) provided with high-energy feed, and milking them regularly, Holstein cows are producing
(4) provided with high-energy feed, and milked regularly, the Holstein cow produces
(5) provided with high-energy feed, and milked them regularly, Holstein cow will produce