Hypothermia (low body temperature)
Hypothermia is a profound drop in body temperature to below normal levels. While potentially serious in any age animal, it can be devastating and likely to be fatal in the newborn calf. Calves less than 48 hours are often hypoglycemic (low blood sugar) with inadequate fat reserves, and may be unable to restore both temperature and blood sugar to normal with their own homeostatic mechanisms. Newborn calves do not have the benefit of a functioning rumen to generate heat.