All dogs need to be trained. Although every dog is trained up to a certain extent (dogs adjust themselves to the owner's lifestyle), additional training may be required according to the individual temperament of each dog and to the owner's degree of tolerance.
Most dog obedience problems are related to giving the dog excessive independence and affection that we, owners, may lack. Diet is also an important element for the apartment-bounded dogs. Many dog food types are protein-rich, which is right for a dog that lives at countryside, but inadequate for dogs that have to stay indoors for 20 hours daily. Will the lucky ones get 4 hours of exercise a day?