<P> On 14 February 2003 , Dolly was euthanised because she had a progressive lung disease and severe arthritis . A Finn Dorset such as Dolly has a life expectancy of around 11 to 12 years , but Dolly lived 6.5 years . A post-mortem examination showed she had a form of lung cancer called ovine pulmonary adenocarcinoma , also known as Jaagsiekte , which is a fairly common disease of sheep and is caused by the retrovirus JSRV . Roslin scientists stated that they did not think there was a connection with Dolly being a clone , and that other sheep in the same flock had died of the same disease . Such lung diseases are a particular danger for sheep kept indoors , and Dolly had to sleep inside for security reasons . </P>
<P> On 14 February 2003 , Dolly was euthanised because she had a progressive lung disease and severe arthritis . A Finn Dorset such as Dolly has a life expectancy of around 11 to 12 years , but Dolly lived 6.5 years . A post-mortem examination showed she had a form of lung cancer called ovine pulmonary adenocarcinoma , also known as Jaagsiekte , which is a fairly common disease of sheep and is caused by the retrovirus JSRV . Roslin scientists stated that they did not think there was a connection with Dolly being a clone , and that other sheep in the same flock had died of the same disease . Such lung diseases are a particular danger for sheep kept indoors , and Dolly had to sleep inside for security reasons . </P>
how long did the cloned sheep dolly live
how long did the cloned sheep dolly live
6.5 years
6.5 years