Burp measurers
Scientists have fitted some sheep with special machines to measure exactly how much gas is produced when they burp.
They hope this will help them to invent food that will stop the animals producing so much wind.
Wind tax
A farmer from New Zealand said: "They can blow up like a huge balloon and it's all gas."
If scientists can't stop sheep burping so much, farmers will be taxed for the wind that their animals produce.
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