For those who are searching for a dog, when selecting a dog, there is a right and a wrong way to do things. First off, you must allow the dog to take a liking to you. Regardless of appearance, sex and color, pick the dog that interacts with you more. It is not wise to pick a dog that completely ignores you or doesn't seem to like you because of those things. That is why you must never determine your dogs' color, appearance and sex. The signs of the right dog is: frequent eye contact, licking, following, wanting to play, wanting to be rubbed, jumping on your lap, seems interest in what you are doing. See if this particular dog is willing to follow you; willing to leave its owners, siblings or parents behind to be with you.
The same applies to dogs in the shelter. However, sometimes shelter dogs are the better route. Shelter dogs seem to have more of appreciation than dogs bought from a breeder. Once you have bought your dog, if you haven't already is take it on a long walk. Get starting on training as soon as possible.
Train as often as you can, for a dog is an animal. Animals are prone to forget or even grow stubborn if not given the basic training often. With that stated, basic training should also come first. If your dog is to become something other than normal such as a sled dog, herder etc., your dog must know the basic training in order to do these other things. Dealing with behavior issues must be dealt with as soon as it arrives. If wait until later, dealing with dogs with untreated issues depending upon the problem and breed can be sometimes dangerous. Depending upon behavior issues, they are sometimes not caused by the things you do. In some cases, it is according to the previous life with the owner/owners prior to you. Dogs can receive behavior problems from their parents or siblings; a genetic issue. Some things you do cause augment things, or you don't have to do nothing at all for it to worsen. Either way it goes, ending it right away is the proper way of handling these situations.
In regards of biting and growling, never allow a pup to do so. It may seem cute and harmless then, but it later will turn into a big problem especially dealing with a larger breed. Bigger dogs are required of extensive training, more extensive than any other. If not given the proper training, large breeds are less likely to be capable of being handled by the owner, and ends up at the shelter.
Even if you had the dog for awhile, you must brush up on basic commands. If the dog is stubborn, be persistent until the dog has obeyed. Never surrender when a dog refuses to obey, for it only conditions the mind to grow more stubborn. This allows the dog to think it is okay not to do what it is told.
Majority of people across the globe do not acknowledge this, but consider your dog a dog. People can be too wrapped up into the concept of the dog is apart of the family or dogs are people too. This is not a bad thing, but nearly everyone take these statements to next levels. Everyone seems to forget that their dog is an animal. Do keep this in mind. So although your dog is required to be obedient and to behave properly, do not expect the best from an animal. Dogs are animals who have been domesticated, but are capable of errors. Depending upon the breed and the greatness of training, dogs have a particular level of animal errors.