we use bark and optional chock collars too. The one that we are in control of is used in the field with the working dogs. The bark collar was for an old dog of our and worked great. the neighbors have it now, if it isn't on the dog barks for hours on end. constantly. with it on she tests it to see if it works and stops when she feels it. I recommend them only if everything else has been tried. some dogs just bark at nothing, and a bark collar is helpful. sometimes the citronella collars don't work if you have to re set them after they bark. The dog next door would turn her head and rub on the ground and bark until the spraying stopped then continue on with the day.. barking and barking (they had a battery one)! the bark collars, they aren't bad, and like somebody said earlier, the intensity is with the bark. Make sure somebody is with the dog the first time its on though so the dog doesn't get too scared! good luck!