Service dogs are trained to know when they are on duty. When their harness is on, they know they are at work. When you take it off they instantly become playful and energetic.
11
Cats and dogs can hear ultrasound.
350
A man is more likely to get a woman's phone number if he is accompanied by a dog.
20
Dogs have four toes on their hind feet, and five on their front feet.
179
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Dogs have been man's pet for over 14,000 years.
224
Dogs can make about 100 different facial expressions.
18