@petfacts

The Beatles song "A day in the Life" has an extra high-pitched whistle, audible only to dogs. It was recorded by Paul McCartney for the enjoyment of his Shetland sheepdog.

Dogs are capable of understanding up to 250 words and gestures, can count up to five and can perform simple mathematical calculations. The average dog is as intelligent as a two-year-old child.

The phrase "raining cats and dogs" originated in seventeenth-century England. During heavy rainstorms, many homeless animals would drown and float down the streets, giving the appearance that it had actually rained cats and dogs.

Cats have 30 teeth (12 incisors, 10 premolars, 4 canines, and 4 molars), while dogs have 42. Kittens have baby teeth, which are replaced by permanent teeth around the age of 7 months.

The tiniest cat on record is Mr. Pebbles, a 2-year-old cat that weighed 3 lbs (1.3 k) and was 6.1 inches (15.5 cm) high.

In relation to their body size, cats have the largest eyes of any mammal.

Americans love dogs! 44% of U.S. households have a dog, which equates to 55.3 million homes

A tomcat (male cat) can begin mating when he is between 7 and 10 months old.

The Maine Coon cat is America's only natural breed of domestic feline. It is 4 to 5 times larger than the Singapura, the smallest breed of cat.

A healthy cat has a temperature between 38 and 39 degrees Celcius.

Dogs can see in color, though they most likely see colors similar to a color-blind human. They can see better when the light is low.

Bloodhound dogs have a keen sense of smell and have been used since the Middle Ages to track criminals.

A 2007 Gallup poll revealed that both men and women were equally likely to own a cat.

Dogs can discriminate the emotional expressions of human faces.

Ginger tabby cats can have freckles around their mouths and on their eyelids!