What happened was that I knew about the border collie but wanted to check first in case it was one of the 'myths' that ended up getting passed around. That's how I ended up with the wiki list. :)
I just came back from a conference with a well-known vet, Dr. Becker, and she and other vets were saying that cancer in dogs is nearly 'all' will develop it due to the high amounts of carbs in the commercial foods (I guess sugars feed cancer). That's not to say that carbs create the cancer, but that the diet feeds the cells. As well, so many dogs seem to have the same diseases as people now - notice that? Just makes you wonder when looking at past average lifespan and disease rates.
Yeah, I thought about that when you mentioned about longer dog life span before and then I thought that was the same case with humans before. I guess that is where people's claim that quality of life is degrading as time goes by...
Yes, so true @macoolette