Owners who use the charming dog tag collar may not use it with the strong yanks of a professional trainer. The general dog owner tends to just let the dog pull and because pulling is uncomfortable and even painful to the dog, the dog may pull less. Even when the owner does not use the charming dog tag collar to give jerking corrections, there are still some important pitfalls that owners should be aware of. The biggest pitfall is that if the dog is fearful, say of another dog it sees, and it simultaneously feels the pain of the charming dog tag collar, the dog may learn to associated the pain with the dog it fears and become more fearful of dogs. The second pitfall is that if the dog is highly excited, for instance, it wants to play with another dog and is lunging on the leash to reach the dog, the pain or aversive feeling they get from the collar can increase their excitement and arousal level. In other words it can cause them to bark and lunge more!
One of the most common alternatives to a collar is a harness. Veterinarians routinely recommend that dogs, such as pugs with their short noses, and miniature poodles with their propensity for collapsing trachea wear harnesses. However, it's important to chose the right one. In general I avoid harnesses that hook on the back unless you want to train your dog to pull a cart or a sled. These harnesses actually help train your dog to ignore you and pull you because when you pull on the leash to try to gain some control, they direct the dog's attention away from you.