Here I used the can in each case from several meters away and afterwards not (as it says on the instructions) given treats.
So sure, the box is not a panacea. I train my dogs to 95 percent with praise, treats and smile. But there are also situations where exactly is not working. And if not bitching does not work, why? My little one is now sitting in no way scared somewhere in the corner, but playing with the big players in the garden. Only on the books she seems to have lost interest;) There are therefore from me 5 stars. Because the part is neither toxic nor overly noisy and damage it adds to the dog in any way to.