It's a funny thing but while some think photographs make people look fat, I think photographs make dogs look skinny, or at least skinnier, because if you saw this girl in real life, you'd go, "Whoa!" - not that she has any self-esteem issues with her weight. In fact, she's quite happy with it (but the vet may not be). The best thing about putting your dog on a diet is that it's your dog on a diet and not you.
The best way to check on the adoption status of this dog (and other dogs and cats and other small domestic animals) is to visit Toronto Animal Services adoption website or call 416 338 6668 for the Toronto Animal Services South shelter. If the dog is no longer on the TAS adoption website, it's probably because it's been adopted already.