Dogs have four toes on their hind feet, and five on their front feet.
179
Dogs can make about 100 different facial expressions.
18
Cats and dogs can hear ultrasound.
350
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
Dogs sometimes fake being sick to get attention.
26