These are usually called mange proper and follicular mange, or scabies. I want to say a word on the latter first. It depends upon a microscopic animalcule called the Acarus folliculorum. The trouble begins by the formation of patches, from which the hair falls off, and on which may be noticed a few pimples.

Scabs form, the patches extend, or come out on other parts of the body, head, legs, belly, or sides. Skin becomes red in white-haired dogs. Odor of this trouble very offensive. More pain than itching seems to be the symptomatic rule. Whole body may become affected.

Treatment

Dress the affected parts twice a week with the following:

Creosote, 2 drachms; linseed oil, 7 ounces; solution of potash, 1 ounce. First mix the creosote and oil, then add the solution and shake. Better to shave the hair off around the patches. Kennels must be kept clean with garden soap and hot water, and all bedding burned after use. From three months to six will be needed to cure bad cases.