If you thought that this dog had a urethral stone, well… you kinda should have thought of question #2.
The correct answer to question # 1 should have been “I can’t answer until we get an orthogonal view,” i.e. a VD view. This would have revealed that the “urethral stone” is completely off center. It’s superimposed with the left thigh, so it cannot be in the urethra. It turned out to be a calcified “skin tag.”
Morale of the story: “There is no such thing as one view.”