uhh...hope your not serious about the walking while on bocks bit, most dogs crap themselves at the sight of bocks, and the others would jsut pull you over
oh and i don't think many peopel wound sign the disclaimer saying 'yes you can walk my dog while on silts'
oh and don't forget to think about insurance etc, even if it's just being a little gopher for peoples dogs they can sue you for all you have if little pedigree froo froo runs away, or gets any tiny injury