Well from my short expirience, mice has been more nasty to me than rats. Rats havent bit me yet and seem very social, there is even one sitting in my room at the moment, that Im not sure what ill do with... She was too cute to feed off. Anyways, I been bit twice by mice now
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My normal BP has eaten a few weaned (live) rats before no problem. But the last mice I fed her, It wasnt even a fully adult mice yet, bit her as she was constricting it and left her with 2 little scar marks from its teeth. Im sure it will go away with next shed.