A herd of dairy cows are offered an assortment of dietary choices including grass, hay and supplements during the summer months. - Stock Photo & Image

Hereford cattle wear sensor tracking collars to help farmers know their location, diet and when they're in heat.

Full profile view of a Hereford dairy cow grooming herself while standing in the pasture with other cows.

Wide open pasture land and a perfect, clean environment for grazing dairy cows during the summer months.

Black and white cow eating green meadow grass

Bulling behavior as a female dairy cow in heat mounts another female cow in the middle of a herd grazing in the pasture.

Ripe, yellow grassland provide a perfect setting for dairy cows in a mountain valley during the summer months.

Wide view of Friesen Hereford dairy cows congregating around a traditional wood barn beside the pasture.

Frontal view of a black and white dairy cow standing in her pasture.

A dairy herd graze in spring grassland

Hereford dairy cows congregate around a round feeding trough that has been filled with hay.

A herd of Dairy cows graze on a ranch in Washington state.

Hereford dairy cows crowd around a barbed wire fence to get a better look of their visitor.