Aaaaargh. Dog did a scent marking wee on a boy's sport bag yesterday. Boy's father very, very, very angry. At the local playing fields where I walk him. Man put bag down, dog off lead, ran over to investigate, sniffed, I called him, but he did a quick leg cock before returning to me. I suppose there is no way of preventing this, other than keeping him on the lead all the time. Man told me I wasn't fit to be a dog owner, which seemed a bit harsh, no?