This article discusses the work of Erik Bolt and others and their findings about space requirements for dairy cows. Bolt suggests that dairy cows prefer to eat, stand and sleep together, and also require lots of room to be comfortable. Mathematics were used in the study to determine the costs of cramming cows together to increase herd size versus allowing them to be comfortable but use up more space. The study found it was more profitable in the long run to allow cows to be comfortable.