Many modern dogs are variations of former dog breeds that, for various reasons, have gone extinct. These dog breeds, in particular, are some of the most well-known breeds of dog that no longer exist.

One more teddy bear dog breed you'll love are Finnish Laphunds. They are often employed as hard-working reindeer herders and ...

Q: Among the dogs I've had over the years, my small dogs lived longer than my large dogs. Is this generally true? If so, why?