Between 1980 and today, the number of geriatric cats (10+ years) diagnosed with feline hyperthyroidism has risen from 1 in 300 to 1 in 10. There is some evidence that exposure to flame retardants may contribute to the development of feline hyperthyroidism. Beginning summer 2017, FSES partnered with the OSU Veterinary School, Columbia University, and the Animal Endocrine Clinic to compare levels of flame retardants found in homes of hyperthyroid and non-hyperthyroid cats.

For more information about feline hyperthyroidism, see the AEC’s FAQ page (

For more information about this study, see the recruitment brochure and FAQ page. If you are interested in enrolling your cat in this study, contact Dr. Jana Gordon at the OSU Veterinary School. 541-737-4812 or

Click here for a printable PDF brochure on the study.