How many people does it take to run a farm?

The number of animals that can fit on a farm depends on how big the farm is, what animal is being raised and how the animals are raised. On family farms where animals graze in fields, the number is much, much less than on factory farms where they are not allowed to graze.

For an example, I once lived near a chicken "farm." It was actually three or four large long and narrow buildings where chickens were kept in cages, (Did I mention there were no Windows in the buildings?) There were thousands of chickens in those buildings that laid eggs which were taken to grocery stores. For the same amount of chickens to be in chicken coops and allowed freedom to be outside, it would take a very, very large farm or many smaller ones.

It is the same with cows, pigs and other animals. You can cramp them into a smaller area and get thousands in a smaller space or allow them to have space and get many less in the same area.