The butler left Rusty in a room which was suitable for the care of a dog. With no other choice, Rusty accepted this new side of him and proceeded to sleep in the doghouse.
The next morning, Rusty slowly started to get up from his long sleep. When he was finally awake he learned something that shocked him: he was no longer a dog but a human again.
At first he was relieved but soon discovered that his curse had left a side effect on him. Although he was now a human, that would only last during the day since at night he would be transformed into a dog again. Kind of like a werewolf kind of thing.
Despite that, Rusty tried to see the positive side of it. He might be a dog at night, but he would still be the same during the day.