My dog is sick!

My dig, Ozzy,from my previous post, has caught red rashes on his body! The red rash is mostly on his neck and it is super red. My fathr went to many doctors but none of them worked. Even after he took the things many people has prescribed him, Ozzy was still very sick. Until, my father brought Ozzy to Ozzy's main barbour, he told my father to use special shampoo and oils and some very expensive medicine. It was hard to believe that all those actually cured Ozzy by a lot and now he looks so much better than before but still with some rashes. I hope he gets completely cured soon.