Has anyone had any experience with feline hyperthyroidism? My 14-15 year old cat was just diagnosed with this condition, and I'm looking at 2 main treatment options: medication or surgical removal of the affected thyroid lobes. Sassy also needs a teeth cleaning and a lump on her shoulder needs to be removed, so she'll already be under anesthesia. We're leaning towards surgical removal but would appreciate any thoughts or opinions.