Most of aggression problems are caused mainly by one reason - lack of physical and psycho-emotional activity. The uniqueness of the PULLER is that it is able to provide the necessary workout and at the same time a dog owner does not have to spend a lot of time on training. Just three simple exercises for 20 minutes are comparable to 3 miles of intensive run or 2-hour training session with an instructor. You will be pleasantly surprised how quickly the problems associated with your dog"s behavior become a thing of the past. Moreover, these exercises will help develop muscle groups. The dog will quickly improve physical condition and look great!We would like to draw your attention to a specially developed material of the PULLER:- Special non toxic compound allows owner to work with the dog for long periods of time. - Ability to float in water opens up additional opportunities in exercising and interacting with the dog.-It is odorless, which is very important when interacting with dogs. Also, PULLER does not leave any odor on hands of the handler.-It does not injure dog"s teeth and gums. When being bitten, PULLER gently lets dog"s teeth to sink deep inside the material, without loosing its shape or properties for long periods of time. That"s why PULLER"s material is unique. All dogs like this effect. After trying it once, all dogs simply "fall in love" with it.This quality of the material has helped train many dogs to fetch, although there were no means to make the dog do it before.PULLER consists of two identical rings - this is the basic requirement of this exercise device and the major difference from the rest of the products. This approach allows increasing intensity of the workout, allowing the dog to receive necessary amount of exercise in short periods of time.