Cats have better memories than dogs. Some tests have concluded that while a dog's memory lasts no more than 5 minutes, a cat's can last as long as 16 hours - exceeding even that of monkeys and orangutans.
Cats have more than one hundred vocal sounds, while dogs only have about ten.
Contrary to popular belief, dogs do not sweat by salivating. They sweat through the pads of their feet.
Dogs' eyes have large pupils and a wide field of vision, making them really good at following moving objects. Dogs also see well in fairly low light.
Every know dog except the chow has a pink tongue - the chow's tongue is jet black.
It has been established that people who own pets live longer, have less stress, and fewer heart attacks.
Scientists have discovered that dogs can smell the presence of autism in children.
The theobromine in chocolate that stimulates the cardiac and nervous systems is too much for dogs, especially smaller pups. A chocolate bar is poisonous to dogs and can be lethal.