Law enforcement and natural disaster response teams are often largely dependent upon the help of rescue dogs (or search-and-rescue dogs) to find trapped or lost human beings, or sometimes, in the worst cases, corpses. The most common breeds favored for this kind of work are Burmese mountain dogs, Saint Bernards and, last but certainly not least, Labrador Retrievers. The successful training of a Labrador rescue dog in particular is dependent on several factors, including the dedication of the handler, and the disposition of the dog.
Basically, dogs do not want to soil the areas where they sleep and eat. Additionally, dogs are able to develop habits regarding where they would like to urinate and defecate. For example, dogs that do there business on concrete or gravel will prefer to do their deeds on concrete and gravel and not grass or dirt. You can use these instincts to help train your dog.
Coaching your dog to stop biting does not need to occur after a biting incident, it would need to start from when your dog is a puppy. The earlier training begins the less probable it is that a bite will occur. But, even dogs that are loving and sweet may one day have a biting incident. Training your dog early will help to prevent it, but it will never give a 100% guarantee that there will never be a biting incident.
Aggressive dog behavior doesn't happen out of the blue. Because we don't understand dog language though, we may think that dog aggression is unreasonable. It is important to understand that the first step to solving problem behavior among dogs is to first understand the reasons behind them.