When I t(ake) a walk around Washington Square Park,I often see many people walking with dogs.It is still t(rue) that a dog is the most useful and faithful animal in the world,but people have changed the reasons w(hy) they keep dogs as pets.They u(sed) to keep dogs in order to keep safe,but now they keep them as f(riends),beacuse the city can be a lonely place.For a dog is his p(artner) when they f(eel) lonely.For old couples,a dog is their child when their r(eal) children have grown up.Now you can see the reasons why people keep dogs