Once under anesthesia, the rat is positioned in dorsal recumbency. A 3-cm × 4-cm section of fur is shaved from the ventral abdomen; the distal aspect of the shaved area is 1–2 cm proximal to ...

Both rodents have long, thin tails, but rat tails are hairless, while mice tails are covered with fur. Their coloration can be similar, including shades of grey, white, and brown. The eating ...