There are a variety of other differences in the rat, monkey and human dentate gyrus. Common terms "rat" and "mouse" are not taxonomically specific. The Wistar rat is an outbred albino rat. Hermione buys a cat named Crookshanks, who takes to chasing Ron's pet rat, Scabbers. Differences are due to higher rates of metabolism by male rat liver microsomes. Cats are in conflict with the Rat. They are also related to the chinchilla rat. It's like going back for seconds on rat poison. It is contracted by being bitten or scratched by an infected rat. Napoleon is a small rat with grey fur. She also owns a giant rat named . European associations with the rat are generally negative. He was killed for being a "junkie rat". They include the large, endangered Malagasy giant rat. Remember, you can't rat on a rat.