Researchers Ask: What Makes Chickens Happy? Voice of America
source https://learningenglish.voanews.com/a/researchers-ask-what-makes-chickens-happy-/4709642.html
How do you measure a chicken's happiness? Is it in the way it runs for food? Or by how much time it spends cleaning itself? To find the answers to these ...
source https://learningenglish.voanews.com/a/researchers-ask-what-makes-chickens-happy-/4709642.html
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