Pharlap- But acting out violently won't "reinstate" his status as Alpha. Only by being in control of every resource, food/toys/love/attention etc. Roxy is a "dominant" dog, and the only methods that have worked for me have been non-physical gestures. Body language, "looks", verbal, that may sound ridiculous, but she understands and accepts those gestures much better than if I threw a prong on her, and whipped her to the ground. I can guarentee that she would bite or snap at me if I did that.