my 1st one was the most mellow and I never saw any signs of testoteron surge you mention so I couldn't even begin to understand what your talking about,I never took him for any type of training and he listened very well for me,and my family,you must have had a crazy one,I brought him to socialize at the park with other dogs every weekend and he was he one that usually got the worst end of the deal when ruffing aound and like I said he wasn't nuetered so again I don't understand what your talking about,and if this is the sweet none testosterone age ,I'll wait,he's jumping and nipping now,and i'm not sure my dogs well being and longevity as i've read by research and have expierienced first hand is worth1 year of patience ,even if that were to occur