If the dog has its official coat, harness etc. on you must NOT pat it at all as it is in "working mode" and you must not distract it. You must NOT offer them food at all. I don't know if it is standard with all types of service dogs, but the ones for vision impaired people are taught to "wee" on command. That I know to be fact as I know a family that do some of their training.
by r.eng (score: 3|1021) 1100 days ago