Scientists to probe cow friendships

How cows make friends is to be investigated in a three-year study. Scientists want to understand more about "social networking" within dairy herds.

The aim is to help farmers improve the health and welfare of their cows, thereby increasing milk yields.

For the first stage of the research, high-tech "proximity collars" have been fitted to cows on a farm in Cullompton, Devon.

The collars use radio signals to determine how close one cow is to another, allowing scientists to map the animals' social interactions.