We generally see reversible bone marrow suppression in cats and dogs. We frequently use the drug longer than one week, and I would follow the advise of your veterinarian on this issue. Next Jeannie W, wrote to ask about recurrent ear infections in her 3 year old Rottweiler, Jack. She also asked about possible surgical options. The ear is like a greenhouse.
Many dogs have ears that flop over the opening as well.
These factors make the ear difficult to drain and allow for a warm, wet environment. This is the perfect place to grow yeast and bacteria. To definitively diagnose ear infections a swab should be done for cytology. Under the microscope bacteria, yeast and mites can be identified. It should be recognized that ear infections with yeast or bacteria are the result of problems in the ear, not the presence of yeast or bacteria.