Fog fever is a refeeding syndrome in cattle, clinically named acute bovine pulmonary emphysema and edema (ABPEE) and bovine atypical interstitial pneumonia. This veterinary disease in adult cattle follows an abrupt move from feedlot (dried feed indoors) to 'foggage pasture' (fast growing, lush pasture, with high protein levels). Clinical signs begin within 1 to 14 days and death may follow within 2 to 4 days. The condition can affect up to 50% of the herd, and around 30% of affected cattle may die as a result. This metabolic nutritional-respiratory disturbance has also been reported in other ruminants (red deer) and on a wide variety of grasses, alfalfa, rape, kale, and turnip tops.