One that doesn't bark, bite or eat underwear. Loyal, intelligent and affectionate. In fact, you are less likely to be bitten by a rat than by your average dog. Fancy rats, the kind kept as pets, are distant relatives of Rattus Norvegicus, aka the Brown rat or Norway rat. Comparing wild rats to pet rats is about like comparing wolves to poodles.
Rats are more intelligent than most mammels.
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