Dolly, the most famous sheep in all history, developed arthritis at the age of five and later a lung disease called Jaagsiekte , which is why scientists finally decided to euthanize her when she was six and a half years old.
The life expectancy of a Finn Dorset sheep, to which Dolly belonged, is 11 or 12 years, so Dolly lived only half of what these animals usually usually survive.
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Dolly the sheep was sired at the Roslin Institute (Scotland), where she grew up and died on February 14, 2003.
