Jersey cow, 3 years old. Calved last May. She lost some condition in the fall at the worst part of the drought. Is on free feed good grass hay. Access to salt and mineral blocks. Dry right now. Not bred back. Has been wormed with Ivomec. She is a lot thinner than I want her. She's not gaining weight on hay. What is the best supplemental feed for putting weight on? We usually feed sorghum hay for winter weight gain, but due to the drought, all the sorghum hay failed this year. So, I need an alternative feed and amounts to feed per day.