[marktwain]

Less than 2 acres and you will have to supplement their graze with hay or grain. An expensive proposition.

That is for very fertile ground.

Most grazing land is not as good as that!

[oldvirginian]

“Most grazing land is not as good as that!”

Yes, two acres is minimum on good grassland. We used the 3 acres/head rule. We were blessed in that each of our pastures had bottom land with a creek or spring where the grass was lush and thick.
In nearby Charlotte county the rule of thumb is 4-5 acres/head because of the sandier soil where grass grows thinner.