I have a friend who had a dog get loose from a vacation home in Florida. The dog wasn't familiar with the area and would not know how to find it's way back to them. They laid scent tracks (clothes and urine) in the dirt roads for the dog to come across and find it's way back to the area they were staying.
It took the dog three days, but it was found camped out on the third morning, on one of the T-shirts left for it. It had obvious signs that it had been in a scuffle with something, and required vet care. But it survived.
Hondo Von Dopplet L Bauernhof "Hondo"- GSD
Lilie's Tug McGraw "Tug" - Golden Retriever
Maggie - Mini Dachshund (Rescue)
Lonestar Pivo - Texas Blue Lacy
Ashe - Barn Cat
Katie / APHA