Red bald spots/circular areas where little hair try to grow back on my Dalmatian's back! HELP M

At first I thought she might be alergic to some kind of food or the bed cover, but this has sarted since she was 3 months until now she's seven months old. I showed her to three vets, one told me this is a microscopic insect that affects dogs with white coats, and asked me to use Butox in her shower regularly, but Butox is pretty poisoning and still can't see its progress. The other gave me a cream called TineaCure and I actually used about 5 boxes so far with no progress, third vet who is a relative didnt know for sure what this is so he told me to try putting Betadine on the bald areas so maybe it would kill anything under the skin and again it didnt help and he turned clueless. I have another appointment with another vet tomorrow but I seriously need someone to give me an idea what are these growing bald circles eating my doggie's beautiful coat and skin and how can I stop it and make it go away?! :-( Am worried this might never go away.

Red bald spots/circular areas where little hair try to grow back on my Dalmatian's back! HELP ME PLEASE!?

Is she itchy? If she is scratching the spots then it's a skin allergy which can be treated with topical anti-itch, or shots.

If one vet did a skin scraping and found a parasite, (a type of Mange) then there are treatments, my dog was put on Revolution with a Preventic collar rather than Frontline. The meds in Revolution killed the tiny worm like parasite.

It may be ring or whip worm as suggested.

You have the right to ask lots of questions about the Meds you give your dog. If something doesn't add up - tell the Vet. Better to have him keep looking than take your dog home and get no relief.

Red bald spots/circular areas where little hair try to grow back on my Dalmatian's back! HELP ME PLEASE!?

Sounds like ringworm. Try using blue or red coat spray on it (can be found at your local farm supplier) or on-line. Careful if it is ringworm it is contagious.

Red bald spots/circular areas where little hair try to grow back on my Dalmatian's back! HELP ME PLEASE!?

Try Solid Gold dog food. It ought to do the trick.