A friend of mine has an American Pitbull/Staffordshire cross (1.5yr old uncastrated male) and needs someone to walk him every day now as she's got a new job that doesn't allow her to go home at lunchtime any more. He's a very sweet dog (friendly and not aggressive at all with people or other dogs) but hasn't had any real training so pulls a lot when he's being walked. One dog walking service tried taking him out but decided he didn't fit with the pack because he has too much energy. Does anyone have any suggestions for a good dog walker and/or trainer who doesn't charge a fortune? She lives in the city centre by the way.