Just an FYI. Harnesses encourage dogs to pull. That's why huskies wear them. Start with a flat collar, or a martingale collar to teach him to walk nicely on a leash. Get enrolled in obedience classes with him if you are not already going.
He is cute in his harness....but save it for looking cute...not training or walking.
You come from England and you can't spell plus you can't even compose a sentence. What a sorry case you are. I truly feel sorry for your Rotti, he will probably grow into one nasty Rotti. Do the dog a favour and give him away before he bites someone.