Hi. I am assuming Oliver has been neutered as this definately makes a difference. You need to start positively associating all the things he does not like, like joggers, with nice, yummy things, like roast chicken. As soon as a jogger approaches (Oliver will be on a leash), offer him the chicken before he reacts to the jogger. Do this as often as possible and try not to avoid all the "scary" places but overdose him with them. Never walk straight into a situation, walking head on into another dog, for a dog is as if the other dog is challenging him so curve around the other dog. Try and do this for about 2 weeks, if no improvement, please give me a shout as I should be able to help you in a session.
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