Can a dog catch the mange, by walking around where the once contaminated dog was

Someone put a dog with the mange in my backyard. I had the dog removed but now I'm afraid to let my dogs out. I don't want to take the chance of them catching it also. Is there something I can spray or dust my yard with to prevent any chance of my dogs catching it or something I can give my dogs as a precaution. I have a shar pei and a chihuahua. Both dogs stay indoors and until the back yard is safe their outdoor time is very limited and on leash.

If the dog had demodex..then no. That's a hereditary 'mange.' It's not contagious at all. (Your dogs already have a few of those mites on them.all dogs do. It's a genetic defect passed on through inappropriate breeding that allows them to propagate and cause skin disease.)

If the dog had scabies (sarcoptic mange)..then YES, other dogs can indeed pick it up out of the environment, although that's not as common as direct contact. Revolution is quite effective at treating/preventing it. It's a prescription product available from your DVM. Your dogs must be current on their annual heartworm tests before it can be dispensed. We used to have a good yard spray/powder available, but it was taken off the market.

Did you get it confirmed that it was one or the other type of 'mange'? The reason I ask is that many times dogs have severe allergies, seborrhea, etc. that people are convinced is the 'mange'..when it's not at all. Ringworm (a skin fungus) can also appear to look like 'mange'.and it's contagious to other animals as well (to humans, too.)