"I can't say enough about how nervous I was in purchasing a collar like this. I had heard about how horrible these were, and that PETA would find you and hunt you down for attaching them to your animal. Well the later could still happen, but for now we have silence once again in our house, the neighbors aren't calling at 3 in the morning when we are out of town, and the dogs have been very receptive to the collar. Tried everything else, and this worked. don't waste your time with the other products. This one is very safe, and the stagging of the collars shock is the most effective training mechanism to silence your dogs barking problem"