Image: Cleveland Clinic; vitality distinguishes characteristics of survival (heart beat and stroke volume, nerve, muscle, and organ function).
Vitality can be a subjective score for animal condition based on observation of injury, activity, and reflex action impairment. These vitality scores are correlated with survival and delayed mortality; where size and taxa sensitivity to stressors interact to control impairment. Levels of vitality can be indicated by condition class impairment; excellent, fair, poor, moribund, based on evaluation of activity and injury (Benoît et al. 2015, Morfin et al. 2017).