Karnofsky's score modified for cats.

The index of Karnofsky evaluating quality of life was originally developed by David A. Karnofsky in 1948. It determines the ability of a patient to carry on normal activities in life by using a scale from 0 to 100%. This index was modified for the cat. The index enables judgment of life quality and well-being in cats which is very difficult to interpret. Objectivity is given by a classification orientated in details concerning general condition as well as eating, playing, sleeping, and social behavior.