in my experience, neutering a dog does NOT work.( and i regret subjecting my dog to it) there are several sprays on the market that has not worked in my opinion . i think it is a short term behavioural problem that will pass with time. my current dog of 13 years destroyed all the kitchen cupboards (at the age of about 18 months) to my utter dismay (he got a repremanding), but has since turned out to be the most placid hound a man could want. as like children, some like to go through the terrible two's stage. i went through it at 24 : )