laboratory rat
inbred strains of Rattus norvegicus used for scientific research
Brattleboro rat
breed of rat
guided rat
rat with electrodes implanted in its brain to allow remote control of its behavior
Sprague-Dawley rat
breed of rats
Ralph
cloned male rat
Wistar Rat
strain of outbred albino lab rat
Zucker rats
obese and lean rats cited in research