Avoid trainers who want to train your dog without you. You and your dog are both essential in developing a well-trained companion. During a session, don't allow a trainer to work with your dog unless he or she tells you exactly what's going to happen. Look for treats. Avoid trainers who won't use food as a training reward.
Food is a powerful positive training tool that works with most dogs.
It also makes training and learning fun. A trainer should use other positive rewards, such as play, for good behavior. Soon, the sound itself becomes a remarkably effective reward for good behavior. They're a sign that a trainer doesn't understand the complexities of a dog's behavior and individual needs. Shun cruel collars.