All Feline Hospital Files - 'Hyperthyroidism'http://allfelinehospital.evetsites.netHyperthyroidism is probably the second most common disease that we can see in older cats. The exact causes are unknown despite continuing research. The good news is that not only is it manageable with medication or diet, but it is potentially curable with surgery or radioactive iodine treatment.Hyperthyroidism on the title to the left to download a printable pdf version of this handout.file/40880/Hyperthyroidism