Bark Collars are not a good solution for a dog that barks excessively or without a valid reason, because these collars do not treat the problem of your dog at its source but just treat the symptoms, and on top of that, you will cause your dog pain, hurt him and make him more aggressive…. Same thing for a Muzzle , it will not resolve your dogs barking problem I Recommend you to use No Shock Bark Collar , it's painless for your dog but only as a temporary solution.