Many people raise the dogs in their house for many reasons. They have the dogs for fun or protection. Dogs are really smart so  if someone comes in the house for the first time, then they bark at the strange person. So the dogs can keep the house safe. ANd dogs are good for changing the personality. Some people raise the dogs for medical reasons. because dogs can make the people happy. These two things are the reason that I think the dog is the most interesting animal. What else can do that things? Dogs are really helpful for humans. What a interesting animal it is.