One criticism of a shock collar is that is supposedly inhuman Best Rechargeable Bark Collars e. I encourage you to go ahead and put the collar on yourself and see how it works. Start at level one and make a barking sound (crazy, I know, but have fun with this) and you will barely be able to notice it. Do the same on level two and you will feel al sight tingle, and so on all the way to level five. This will give you a great idea what your dog feels and just like people dogs will have different thresholds of pain. On some dogs a level one response is all they need, and like with my own dog you may need to put the collar at level five to get him to quiet down consistently.