There are 400 million dogs worldwide.
The most popular dog breed is a Labrador Retriever
Dogs have superior hearing to humans, capable of hearing sounds at four times the distance.
Domestic dogs are omnivores, they feed on a variety of foods including grains, vegetables and meats.
There are 500 million cats worldwide.
A group of cats is called a clowder, a male cat is called tom, and a female is called a molly or queen while young cats are called kittens.
Cats can be lethal hunters and very sneaky, when they walk their back paws step almost exactly in the same place as the front paws did beforehand, this keeps noise to a minimum and limits visible tracks.
Cats have powerful night vision, allowing them to see light at levels six times lower than what a human needs to see.