main character is a rat and he follows a blue orb

Are the rats the protagonists? I don't know.

The main character is trying to protect himself from his main fear - rats. Waking up in the middle of the night, he discovers that one of the unwanted guests is trapped. The rat turns out to be alive and takes revenge on the character with a painful bite. Next, we will find out why the character is overcome by the fear of these rodents.

A city rat pursues a nearly empty bag of cheese snacks that's drifting in the breeze. His journey takes him through a vent into a highly mechanized rat lab, where one particular white female gets his attention.

Monty is a young cute rat in a rat world living beneath the streeets of Manhattan. When exterminator Dollart gets a new lethal spray to kill all the rodents, Monty, his friend Isabella and Jean-Paul Canalligator have to travel to magic land to make things right.