Our expert says:
Yes, I think you need an animal behaviourist to do a consultation with you. Look on www.animal-behaviour.org.za to find an accredited ABC. You don't say if he's neutered, but this would definitely be the first step in getting some control (at least over the hormones!). Castration can help with leg-cocking, aggression and other dominant behaviour, but you will need behaviour modification at the same time because he is a mature dog. Don't ever call your dog to discipline him - this only leads to mistrust and disobedience, as you have observed. I suggest you don't discipline him at all until and unless you have worked out why he is doing these things. It sounds like stress and frustration are part of his behaviour, so punishing and reprimanding him are only going to increase these things and therefore increase the "bad" behaviour. Perhaps you need to work on lead training him so he can come with you on your runs?
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