Beginning of Essay
are classified into three categories – those that are aggressive, those that are compulsive, and those that are very laid back. These dogs go through very extensive training before performing their tasks. Training takes anywhere from three to twelve weeks. Dogs ....

Middle of Essay
.... A good example of an aggressive dog would be one that runs to fetch a thrown ball, and after retrieving the ball, begins to tear it to pieces. These types of dogs are known for performing their job the best. The second type of drug dog would be the compulsive dog. This dog compares closely to the aggressive dog. The compulsive dog will tend to be a dog that is ready to go at all times. This dog will have to be held back even when it is not needed to perform. Compulsive dogs are dogs that are born to retrieve and do not have to be taught. These dogs will fetch the first time you throw a ball or an item. These dogs train quicker than the aggressive dog ....