Dogs are great pets for a bunch of reasons. First, dogs give great exercise to humans. Dogs will be so relentless in their enthusiasm, which makes them great motivators for exercise. Therefore, it helps people from leading to obesity. Second, dogs give us the best welcome home in the world! Dog owners are guaranteed to get an awesome welcome home every night.
Third, dogs make us very happy. Research has shown that most dog owners have really good self-esteem, and they tend to be less lonely. Fourth, Everyone knows that every dog will bark at the mailman and go berserk when they hear a door or hear a doorbell. This may be very annoying but this just means they are great protectors and security guards.