Here's what they typically eat:
* Grasses: They are a major part of their diet, especially during the summer months.
* Forbs: These are broad-leaved flowering plants.
* Shrubs: They eat the leaves and twigs of shrubs.
* Lichens and Mosses: They can access these in the winter when other food sources are scarce.
Their diet varies based on the season and the availability of food in their environment.