Levels of stress hormone in saliva of newborn deer fawns may predict mortality

The first-ever study of the levels of the stress hormone cortisol in the saliva of newborn white-tailed deer fawns yielded thought-provoking results that have Penn State researchers suggesting predation is not the only thing in the wild killing fawns.

source https://phys.org/news/2021-01-stress-hormone-saliva-newborn-deer.html