Mowing at sunset (video of Eve moving sheep on pg 2)

In terms of the animal's health, there are a few poisonous plants to be aware of: Plants Poisonous to Livestock and other Animals.

This is an example of prescribed grazing in MD for areas that are hard to mow to restore habitat for an endangered species.
Goats are latest tool in restoring bog turtle habitat

Targetted grazing to reduce wildfires in Carson City NV