It's a misconception that dog trainers never use harnesses. In fact, dog trainers often use harnesses for various reasons. However, in some specific training scenarios, trainers might choose not to use harnesses, and the reasons could be as follows:
- Interference with natural movement: Some trainers believe that harnesses, especially those that are too tight or not properly fitted, can restrict a dog's natural range of motion. This is particularly important in activities like agility training, where the dog needs to move freely and quickly. A harness that restricts movement could potentially affect the dog's performance and even lead to injury over time.
- Weakening of neck and shoulder muscles: When a dog pulls on a harness, the force is distributed across the chest and shoulders. Over time, this could potentially lead to a lack of development or even weakening of the neck muscles that a dog would normally use to pull or carry objects. In some working dog training, such as sled dog training, trainers might be concerned about this effect as strong neck muscles are crucial for the dog's work.
- Masking behavior issues: Harnesses can sometimes mask behavior problems, such as pulling on the leash. If a dog is used to pulling while wearing a harness and the harness makes it easier for them to do so without feeling much resistance, the dog may not learn proper leash manners. Trainers who want to address these behavior issues directly might prefer to use other training tools, like a flat collar or a training collar, that provide more immediate feedback to the dog when it pulls.
- Safety concerns in certain situations: In some cases, harnesses might pose safety risks. For example, if a dog gets into a fight with another animal while wearing a harness, the harness could potentially be used against the dog by the other animal, making it easier for the attacker to gain control. Additionally, in the event of a dog getting caught in a fence or other obstacle, a harness might make it more difficult to free the dog compared to a collar.
It's important to note that these reasons are not absolute, and many trainers do use harnesses effectively for training, especially for dogs that have neck or back problems, or for those that are prone to pulling. The choice of whether to use a harness or not depends on the specific training goals, the dog's individual needs and behavior, and the trainer's experience and preferences.