#behavioral tests

NEW YORK | What makes chickens happy? Nobody is quite sure

NEW YORK — How do you measure a chicken’s happiness? Is it in the way it runs for food? How much time it spends preening?

To size up what might make chickens happy in their brief lives, researchers at the University of Guelph in Ontario, Canada, are putting 16 breeds through physical fitness and behavioral tests.

They’re watching how well birds scramble over a barrier for food, how skittish they…