When the eczema is not the result of an external irritant, it takes usually from one to two weeks to heal.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Cattle fed on the refuse from potato-starch factories develop a most obstinate and widespread eczema, beginning on the legs.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Localized eczema may be caused by irritant substances applied to the skin-turpentine, ammonia, the essential oils, mustard, Spanish-fly ointment, etc.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler