Positive. As would putting collars that emit the same noise when the dog barks more than once. The noise distracts them from what they're barking at. After a few months, they are trained not to bark all the time. The citronella ones work as well, but I've never used them. I didn't want to smell citronella all the time. I would say no shock collars, unless you try them on yourself first. After that, you wouldn't dare put one on a dog.