The Basenji dog is the only dog that is not able to bark.
4
Dogs sometimes fake being sick to get attention.
26
Cats and dogs can hear ultrasound.
350
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
Whales and dolphins can't taste anything other than salt.
11
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
Alligators can live up to 100 years.
337