In the U.S. alone, more than 5 million puppies are born every year.

It takes 4 weeks for a puppy to fully develop the ability to hear.

Like human babies, Chihuahuas are born with a soft spot in their skull. This is called the molera, and it closes up as the puppy grows.

It takes 4 weeks for a puppy to fully develop the ability to hear.

When a puppy turns one year old, it is as physically mature as a 15-year-old human being

A woman carries her baby for 9 months. A female dog only carries its puppies between 58 and 68 days, roughly 9 weeks

Puppies are born in litters of just 2 to as many as 16

After about 15 days, puppies can stand up. And when they are 21 days old, they are usually able to walk

Puppies have a strong urge to chew. If you care about your sofa, make sure you have enough doggie toys laying around!