Are Mule Deer Herbivore Carnivore Or Omnivore?

Are Mule Deer Herbivore Carnivore Or Omnivore? Mule deer are herbivores and chiefly forage on plants and berries. They enjoy shrubbery, grasses, twigs, leaves, mushrooms and vines. Mule deer are even known to forage in the summer on California Buckeye leaves, although there is evidence of that plant’s toxicity. Is a mule deer a herbivore?