Negative Quarter-Power Scaling

For the vast majority of animals, an animal's metabolic rate scales to the ¾ power of the animal's mass.

if q0 is the animal's metabolic rate, and M the animal's mass, then Kleiber's law states that q0 ~ M¾.

Over the same timespan, a cat having a mass 100 times that of a mouse will consume only about 32 times the energy the mouse uses.