For the health and wellbeing of your dog, training should really not ever be considered an option when owning a dog. Well trained dogs are more likely to be behaved and listen, be void of behavioral issues, be good in public, and are less likely to bite. Owners also have a much closer connection with the dog when the time is taken to form a relationship through training.
Food, shelter, exercise and regular visits to the veterinarian are all a part of the basic care package that accompanies dog ownership. However, there is one more important aspect of proper canine care that must not be forgotten or neglected, and that is grooming. In order for a dog to stay clean and healthy, proper hygiene must be maintained, and given that dogs can do little more than lick themselves to remove the occasional annoying substance, grooming of your animal is your responsibility.
So you have made the decision to get a dog. Perhaps you had a bad experience once before with a dog who you thought was cute or friendly, but then when you got him home he turned out to be a holy terror, and the whole thing turned into a nightmare. Even if you have never had such a bad experience, the fact remains that choosing a pet is a life-changing decision, and it is one that takes a lot of thought and research.