Only if it fires.If you pull the trigger does it make the dog poop?
A small person or someone with a weak grip will not be able to retain control of a large or determined medium sized dog with that configuration. Unless it is adjustable like some pistols, it will be uncomfortable for 2 out of 3 people who pick it up (as in small, medium, large hands).
My personal reaction is I don't think it looks cool to appear that I'm trying to shoot the dog I'm walking, which is the first thought that came to my mind my when I viewed the picture.