How concerned should we be about pop top cans and hyperthyroidism? It's hard to find cans that are not pop-top and how seriously should we take this scare? What percentage of all cats get this disease and if it's only 2 percent according to an About.com article on the internet then I seriously doubt that 98% of all cats who are not going to get this are not eating from pop top cans. Still since this info came out I've been worried. I hope I'm not predisposing my cats to the disease.