Cows Have Best Friends

A herd is not a crowd milling about at random. Watch one field for a few weeks and pairs start to stand out: the same two animals grazing shoulder to shoulder, lying down together, drifting across the grass as a unit and turning up at the gate side by side.

Researchers went further and measured it. Pen a cow with the companion she normally chooses and her heart rate settles and her stress hormones stay low. Pen the same cow with one she does not associate with, and both go up. She is not merely tolerating company; she is telling the difference between one cow and another, and she has a preference.

This has consequences on real farms. Herds where established pairs are kept together are calmer and easier to handle, and splitting a pair is a measurable stress rather than a sentimental one. Young calves raised with a companion rather than alone even learn simple tasks faster, which is a strange and rather touching result to find in a spreadsheet.

So the cow standing at the fence with an air of patient expectation may not be waiting for you, or for food, or for the gate. There is a fair chance she is waiting for somebody in particular.