In two recent studies, flame retardants, or polybrominated diphenyl ethers (PBDE), were found in the serum of both pet dogs and cats. The most recent study, published this April in the journal Environmental Science & Technology, found concentrations of PBDE’s in the blood of dogs to be 5 to 10 times the concentration found in people. In a 2007 study of cats, the concentration of PBDE’s was found to be 20-100 times the concentration found in humans. This high level of PBDE’s has been linked to disease in cats.