New research suggests that chemicals found in upholstery and carpeting could harm feline thyroids. The chemicals are called per- and polyfluoroalkyl substances (PFAS). They were in common use until about 2000 in furniture, floor coverings and clothing because of their ability to repel water and oil.
It is imperative to better understand how these persistent chemicals might affect everyone in a household, including pets.” Jacqueline Moline, MD, MSc
Source: HealthDay, September 26, 2021. Link. Sharing results of a preliminary study, researchers shared that as feline blood levels of PFAS rose, so did the odds that a cat would have an overactive thyroid.