Abstract: A system and method of training or modifying the behavior of pets and, in particular, dogs is disclosed and may include using scratch-resistant protector having adhesive and/or additive to protect the integrity of a door or other object. The adhesive may generally provide a securing or coupling relationship between an object and protector. The additive may provide a material that canines find unpleasant to smell, taste, touch, and/or scratch. In some implementations, the additive may be reapplied (e.g., if it wears off and/or otherwise diminishes in strength, quantity, quality, and/or overall effectiveness).