Image makeover needed for the rat

Some rat facts include:

* Their lifespan is between 1-3 years;
* They have no gallbladder;
* Rats have a bellybutton;
* Rats can't vomit;
* They are prolific breeders: A pair of rats can produce 15,000 descendants in their lifetime, and female rats spend almost their entire lives pregnant;
* Rat teeth are incredibly strong and can chew through walls, plumbing and even concrete.