Extra Large Dog Breeds or Giant Dog breeds often need a stronger, more potent stimulation for an effective training session. The available Dog Barking Collars that suit them are equipped with higher stimulation levels that may be necessary to produce the expected results. Ultimately, it still depends on your dog’s temperament and personality. Some extra-large dogs are sensitive in nature so the lower stimulation levels would be enough but they may need the large models for it to fit comfortably. Give us a call if you need help in choosing the perfect Bark Control Collar for your furry giant.