The image to the right demonstrates what 'Intensive' grazing can look like. This is a high density mob of cattle that is quickly progressing to new grass. You can just barely see the electrical line and red post tips in front of the cattle. Cattle are natural comfortable at such densities and it mimics the natural predator protection,

Click on the video or alternatively, click here to view the USDA Natural Resource Conservation Service Youtube portal for Growing Organic. Link