How Fast Does Untreated Sarcoptic Mange Progress in a Dog?

Generally, we're talking weeks to a few months rather than days, though it varies a lot from dog to dog. After a dog is exposed, signs usually appear anywhere from about 10 days to 8 weeks later. Itching is often the first thing owners notice, along with red bumps and crusting on the ear edges, elbows, hocks, belly and chest.

Without treatment, the mites keep multiplying and the itching and scratching spread the damage. Over several weeks, hair loss and crusting can extend over much of the body, and the skin often thickens and darkens. Secondary bacterial and yeast infections are common once the skin is broken, and in severe, long-standing cases dogs can lose weight and become lethargic and quite ill. Young dogs and dogs in poor condition may go downhill faster.

The good news is that sarcoptic mange responds well to treatment. Most dogs improve within about 2 weeks, with full recovery in 6 to 8 weeks, and every dog in contact should be treated too. Read more about sarcoptic mange signs and treatment.

This is general information, not a diagnosis. Please follow your own vet's advice.