What is a handler's primary concern during training sessions?

The primary concern for a handler during training sessions is handler safety. This aspect is crucial because a handler must ensure that both they and the dog remain safe throughout the training process. Safety considerations include being aware of the dog's behavior, potential triggers that may cause aggression or anxiety in the dog, and maintaining a controlled environment to prevent accidents or injuries.

While the appearance of the dog, the location of training, and the speed at which the dog learns can influence the training experience, they do not directly address the immediate welfare of the handler and the dog. Prioritizing safety allows the handler to create a positive and effective training environment, fostering better learning outcomes for the dog.