Does a fat dog make you want to lose weight?

I've seen a couple of overweight dogs. Last time we went to the veterinarian, there was this lethargic looking chihuahua who was heavier than Chooey. She was smaller than Chooey but weighed .2 kilos more. The poor thing was being over fed and spoiled by her masters. The next day we got there, we saw her on IV. She had liver problems- probably for being overfed.

Fortunately, we no longer need to keep tabs on their dog. If they aren't thin (for being a picky eater), they're too active that the food they eat is being utilized by their bodies.