The story of the dog's life...
It runs away from home (and the little girl who harassed him), eventually ending up in Krup, where people feed it and fatten it up more. Once the dog isn't being fed anymore, it moves on, running into the massive quicksand field east of Krup.
What does the chubby puppy do? He uses his body fat to float across! And once he had crossed the quicksand, he waddled up to Monsen, where he rested until he was caught off guard when the party offers him cake. Then, he's taken away to Aiedo, where the little girl chases him around.
An explanation for the dog magically avoiding/surviving enemies... The dog secretly knew the YUMMY tech, turning enemies into edible delights! So this would place the dog at the top of Motavia's food chain. *nods*
Okay, I made up the floating part some other stuff. Obviously.
