Stop the Barking! Dogs bark for many reasons, as a warning, to show excitement, even out of loneliness. For some pooches, the barking can be excessive and cause problems for owners and their neighbors. The ASPCA recommends that dog owners first try to discover the reason behind the barking and make any possible changes to the dog's environment. If the problem continues, the use of bark control collars can be an effective tool in curbing this aggravation.