Given the events of the cartoon, I'm pretty sure that the fight with the giant rat never actually happened and the kittens were just stoned off their asses on that catnip.
And due to the property damage caused by stray, anthropomorphic animals the shop went out of business, the shop owner's children had to live in a van by the river and the entire community in general suffered no longer have a store near by to provide them with the goods they needed.