Re: "Dogs carry the oldest known living cancer" Transmissable cancer? Very interesting. The HeLa genes they mentioned in the article - taken from one original patient - I had heard of. It's going right off topic, but there is a fascinating and very readable book about Henrietta Lacks and the contribution she (inadvertently) made to modern medicine... http://www.amazon.co.uk/The-Immortal-Life-Henrietta-Lacks/dp/0330533444/ref=sr_1_1?ie=UTF8&qid=1390770117&sr=8-1&keywords=henrietta+lacks Just in case the rain and mud last forever and anyone is looking for new reading material! Clare