Inbred WF (Wistar Furth) rats are a strain of laboratory rats that are specifically bred in a controlled environment for research purposes, characterized by their uniform genetic background and reduced genetic variability compared to outbred stocks, which makes them ideal for studying the effects of specific genes, drugs, or environmental factors on physiology and disease processes.

'Inbred BB råttor' är en speciell stam av laboratorieråttor som har selektivt avlats för att utveckla en genetisk mutation som orsakar diabetes, genom att ha en defekt i den gen som kodar för proteinen glukostransporter typ 1 (GLUT1).