 Dogs have 18 different muscles that move each ear.  Dogs can see some colors like blue, yellow, and gray.  Dogs can hear sounds four times farther away than people.  Dogs sweat through the pads of their feet.  Domestic dogs have been companions to people for more then 15,000 years.  There are more then 400 different breeds of dogs.

 Small dogs live longer than large dogs.  Small dogs may live 20 years.  Giant dogs like Great Danes may live eight years.  Mixed breed dogs live for about 13 to 14 years.

 Dogs can help people with farm work and hunting.  They help keep people safe.  Dogs help people with disabilities.

 Besides using their voices to bark,growl or whine dogs also use different parts of their bodies.  A wagging tail does not always mean that a dog is happy.

 Did you now that the first living creature to visit outer space was a dog?  Include breeds that work as police dogs, guard dogs, search-and-rescue dogs and sled dogs.  Some hounds use their extra-strong sense of smell to follow animals and help police to find missing people.

 Many terriers have a patch of long fur on their chin that looks like a little beard.  The Yorkshire Terrier is the most popular small dog breed in the united states.

 Puppies in the same litter might different in other ways too.  Some puppies are very playful other puppies like to stay close to their mom.

 Puppies’ eyes are sealed shut at birth.  Their eyes only open when they are around ten to fourteen days old.  Puppies begin to hear when they are about 18 days old.  They start to get teeth at 6 weeks old.

 Dogs don’t smile when they are happy.  They wag their tail.  When dogs show their teeth they are angry.  Dogs can follow a scent or the smell of a person or object and track it for many miles.

 Cute puppies