Best feed to put weight on cow

Proteins are for tissue building, you may want to focus on energy foods such as oils, carbs, fats. Excess energy foods turns into fats and are deposited throughout your animals frame. Proteins are more important in animals from birth to adulthood...Topside

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TOPSIDE FARMS

Well, that's why they recommended the rice bran. It's high in energy and high in fat. Was being sold as a way to put weight on under weight horses, but was being used on cows with excellent results. She may need muscle too, but what she needs is just fat.

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"Be still sad heart, and cease repining. Behind the clouds, the sun is shining. Thy fate is the common fate of all. Into each life, a little rain must fall." -Longfellow

The simple answer would be the hay she is on and 5 to 10 lbs of the range cubes. It is as simple or complicated as you want to make it.