Depends on the type of behaviour being exhibited , in agression cases i thinkits best to find the cause of aggresion first before going in with harsh rattle bottle tacticks as fear its self is most probably the cause , therfore making an already nervouse dog worse , I guess in our case we are lucky our girls are not naughty they are very chilled out and well behaved , if a times a little cheacky but thats about it and therfore a no is usually sufficient .

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