OMG damn dog theives

Back in mid December my dog, a 5 pound Yorkie named Toby was lost overnight. He followed my FIL "god child" out and they didn't realize he is not suppose too be out alone. He is a house dog, well more like a lap dog. He only goes out to potty and right back inside. He is not a fan of the cold weather and hates the rain and snow. Short version after my DH and FIL went door to door asking, he was found the next evening. Turns out neighbors a few doors down, had seen the lady scoop him up, in my driveway, and carry him home. Fast forward to now, Toby has been scratching and chewing at his self since about two weeks later. It gradually gets worse and worse and the days pass. He was also starting to lose a little of the hair on both back legs. I chalked this up to winter shredding as that's the only time he shreds at all, and even then its really not that much. Today, I get home from work, after grocery shopping and a few other errands, I notice his rump looks swollen, extremely red, and he is losing some hair there now. So needless to say, I think he caught the mange from the ladys dog. Yuck! Josh is taking him to the doggie doc in the morning to see whats wrong. I'm so irritated that first off a complete stranger would pick him up, and take him home not mention they obviously don't take care of the dog they have. The moral of this story is Don't steal other peoples dog especially if you can't take care of them in the first place. Have you ever dealt with the Mange? It sounds so gross and Toby is not going to like be isolated for 6 weeks or getting new beds. Blake will not like it either. He adores Toby. He is pretty fond of his bed.