Jul 27, 2008· My vet called today and said he thinks my has hyperthyroidism. The kitty already has diabetes and gets insulin shots. He howls a lot at night sometimes and this fits the description of this disorder as well. The vet says there are medications that can be given to him, but I read on the Internet that there is some type of radioactive iodine treatment that can be given that cures 95 percent ...