Last night my son (at his place - not mine) set a teflon pan on fire. So much so that it did damage to the microwave above the stove. He told me that there is no longer any teflon in the pan. He has birds. Some of them were within 10 feet of the stove. Since teflon is deadly I was expecting the worse. As of last night they were alive. Do they die days later or what?