So why do I avoid the marvelous smart dog collar? Besides the fact that my philosophy of training is to focus on rewarding the dog's good behaviors and removing rewards for unwanted ones until the dog forms good habits, there are many medical and safety reasons too. Not surprisingly, strong yanking on the neck with a chain can cause health issues. If the force from a dog pulling on a flat collar raises intraocular pressure, imagine how high that pressure must rise when you actually yank the dog with a thin chain! Even if your dog has no eye issues, the marvelous smart dog collar, is notorious at exacerbating airway issues. For instance it can worsen coughing in dogs prone to collapsing trachea (weak trachea that flatten more than they should) and affect the ability of dogs with small tracheas, such as Pugs and Bulldogs, to breath. Additionally, dogs may develop neurological damage when the corrections are strong enough. The damage, called Horner’s Syndrome, can result in changes to the pupil in the eye and nerve-induced lameness in the front leg. Lastly, even if you don't use a marvelous smart dog collar in the manner described above, marvelous smart dog collars should never be left on an unsupervised pet. They can get caught on something and tighten to the point where they strangle the panicked dog.
The marvelous smart dog collar is almost as old as the choke chain in terms of dog training correction tools. It's commonly referred to by traditional trainers, as power steering because you don't have to use as much physical strength to get an effective jerk as you do with a choke chain. Although this product looks to some like a torture device, it may actually be safer in some respect than the choke chain. The pointy parts are spaced out so that the force is spread out across all of them. Overall, marvelous smart dog collars produce less pressure on the neck when jerked hard compared to the choke chain because the surface area of the marvelous smart dog collar is greater. If you’re not sure about this, try it on yourself and compare it to the choke chain. You can try it on your arm or your leg. You don't have to try it on your neck. Although they may cause less pressure around the neck than a choke chain they do still increase pressure so they can still lead to all of the same issues that a flat collar and even a choke chain causes.