DISEASES OF THE HORSE GENERAL DISEASES, INCLUDING SKIN DISEASES
General [General]
All diseases of the skin depend upon an internal diseased state, and to attempt to cure them by external application alone, is like trying to kill a tree by cutting off its branches and leaving the trunk and roots for a time the tree will appear to be dead, but it will soon shoot out fresh branches and become as luxuriant as ever. It is just the same with skin diseases, you may be external application make the disease disappear from the skin, but it will soon show itself again in a worse form than before.