Cows on a farm near Waiuku on North Island in New Zealand

Tag in cow's ear, British Columbia, Canada, North America

Jersey cows on a farm in the Yorkshire Dales near Bainbridge, Yorkshire, England, United Kingdom, Europe

Cows in bluebells in spring near Ambleside, Lake District, Cumbria, England, United Kingdom, Europe

Portrait of sheep with tags in ears

Curious Holstein cows looking at the camera while standing in a fenced area with identification tags in their ears on a robotic dairy farm, North of Edmonton, Alberta, Canada

Holstein cow with her newborn calf in a pen on a robotic dairy farm, North of Edmonton, Alberta, Canada

Curious Holstein cows looking at the camera while standing in a fenced area with identification tags in their ears on a robotic dairy farm, North of Edmonton, Alberta, Canada

Two Holstein cows standing at a barb wire fence looking curiously at the camera with identification tags in their ears at a robotic dairy farm, North of Edmonton, Alberta, Canada

Sheep In A Pen With Ears Tagged, Northumberland, England

A single calf tagged 162 looking straight at you cropped tightly; Eastend, Saskatchewan, Canada

A group of calves with ear tags looking at the camera; Eastend, Saskatchewan, Canada

Close-up of the head of a Holstein cow standing at a barb wire fence making a funny face, with identification tags in it's ears on a robotic dairy farm, North of Edmonton, Alberta, Canada

Close-up of two diary cows in an alpine meadow with snow-capped mountains in the background, San Candido, Bolzano, Italy

A calf tagged 26 stands alone amongst a group; Eastend, Saskatchewan, Canada

Cattle stand in a row along a ridge overlooking a rocky beach below and blue sky; Cornwall County, England

Cattle posing in a meadow of Val Montjoie with Aiguille de la Pennaz mountain in the background, Alps, France

Cattle posing in a meadow of Val Montjoie with Aiguille de la Pennaz mountain in the background, Alps, France

Black Angus Cow With A Yellow Ear Tag Looking At Camera, Kentucky, United States Of America

Portrait Of A Reindeer (Rangifer Tarandus), Fairbanks, Alaska, United States Of America

Close-up of a cute brown goat's (Capra aegagrus hircus) head with a yellow tag on it's ear, Waupoos, Ontario, Canada