Go to the feed board and you will find several threads on this subject.
I leave mine on one and a half acre lot. I do not drylot. I have fed several feeds, but the Tindle Superstock 12% protein has a lot of corn in it, and it is one of the best all around values. I work them up to about 15-20 pounds a day of the feed. I feed limited hay-a couple blocks. Free choice mineral. We've typically had 3-4 pounds per day of gain, and excellent cut with a fork steak. We've had approval from our butcher as to the marbling and yield. A customer told me the one I just butchered was the best he'd ever had in his life. He is in his fifties and was raised on a Kansas farm. I give most of the credit to good genetics.
Good luck.
what is drylot? should i get salt blocks or mineral blocks?
i think the calve are about 500 pounds now, so would they reguire 15-20 pounds of feed per day.