1 - The tallest dogs are Great Danes and Irish Wolfhounds.
2 - The smallest dogs are the Chihuahua, Yorkshire Terrier and Toy Poodle.
3 - A dog’s hearing is very acute. They can register sounds of 35,000 vibrations a second compared to our 20,000.
4 - Dogs have a wonderful sense of smell. A Fox Terrier has 147 million ‘smelling cells’ and a German Shepherd has 220 million compared to our 5 million.
5 - The oldest reliable recorded age for a dog is 29 years and 5 months-an Australian Cattle Dog called Bluey.
6 - All dogs, regardless of breed are direct descendants of wolves. Technically they are the same species, which means they can breed together and produce fertile offspring.

