teflon hazard?

I was talking to a coworker today who said she once had a guinea pig, and she mentioned that Teflon is bad for them. She said her guinea pig was perfectly happy, and his cage was in/near the kitchen, but she was cooking one day on a Teflon pan and he got quiet suddenly, but she didn't think anything of it. Then she looked over to his cage a few minutes later and he was dead. She said she then found out that Teflon fumes are poisonous to guinea pigs.

I've heard that Teflon is poisonous to birds, but I've never heard about it being a problem with guinea pigs. My parents have Teflon pots and pans and I know we've used them while I was living with them and had my guinea pigs (I don't live with them anymore, but my roommates and I might also have Teflon pots). I've never encountered it as a problem myself, but if it could be a problem, I need to know! As i imagine everyone else would as well....

Does anyone know anything about Teflon being toxic to guinea pigs? I tried to search the forums and couldn't find anything that addressed this issue and I even googled it, but I still can't find any answers.