On a lengthy list of local bye-laws, after some clauses about dog-owners being obliged to lift their dogs' dung in plastic bags and deposit it somewhere hygenically, I noticed that exceptions were made for Guide-Dogs for the Blind. This set me wondering. Are such dogs trained to defecate only "at home"? Actually, my first thought was, "are blind/visually impaired people able to locate any dung by smell, or touch, since they obviously can't see exactly where their Guide-Dog has performed?" It would certainly be a bit odd for a blind person, complete with Guide-Dog, to be accompanied by a sighted companion whose specific purpose was to be a shit-lifter...