Dogs four years old is equivalent to human 34-36 years old, the dog is in middle age, the body function is the peak of the dog. 4-year-old dog to scientific diet, active exercise, so that the health benefits. Diet is best to feed dog food, it is best not to feed human food. Dogs 7 years old, this period of the dog’s body parts function is declining, usually to the dog’s regular body check, such as blood routine, stool routine, etc..
