Puppies can sleep 18 to 20 hours a day during that rapid body growth phase.

Puppies can sleep 18 to 20 hours a day during that rapid body growth

More from the Animal Facts niche...

Animal Facts

The oldest cat video on YouTube dates back to 1894 (when it was made,

Animal Facts

Cats can jump up to six times their length

Animal Facts

Male cats who try to get to a female in heat can show very bizarre

Animal Facts

The earliest ancestor of the modern cat lived about 30 million years

Animal Facts

Smuggling a cat out of ancient Egypt was punishable by death. Phoenician

Animal Facts

Most cats give birth to a litter of between one and nine kittens. The