The Basenji dog is the only dog that is not able to bark.
4
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
A group of pugs is called a grumble.
10
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
Dogs can make about 100 different facial expressions.
18