My scale was almost just like that. It was a real small postal scale, but I knocked it off the dresser (no pup on it, lol). It worked for awhile by working the wires around that held the 9 volt battery, but since went caploot! I need another one.
Moni, don't feel bad about little Mojie. I recently had to start cutting back on Coop. He has probably 3 extra lbs. on him. It happened so quickly and just caught up with him. Poor fella. I am working hard on it but should really go out and buy a scale like you have. Our poor angels on a diet. It's never fun for anybody!!! heheheh.