My toy poodle developed a rash on the stomach and next he had cold symptoms. He was diagnosed with sinus and broncitis. They kept giving him antibotics that put him on his death bed and he had days to live. I researched his symptoms and concluded that he had a sytematic yeast infection. The first thing I did was stop all drugs. I gave him 1/4 tsp of colloidal silver 3 x a day for 1 week, after 48 hours he was up and walking. Silver kills yeast and fungis. I ordered Oxy E drops and put one teaspoon in a gallon of water in a steam vaporizer, made a tent and gave him steam treatment in his kennel 3 times a day.
Also got anti fungal med, from vet after scrape was taken from rash, proved to be yeast. Oral intraclozone for three weeks. If your vet won't help, order from Canada, it only comes in tabs that have to be resplit to the weight of the dog. Dog also eats grain free food. If yeast is in nose and eyes I put collidal silver right in nose and eyes, cleared up completely. Dog has relaspes every 3 months which happens, I put a mixture of vinegar and water on rash and give him oral fungus med every 3 days to manage it. He is doing great and very happy.