Very interesting article on this topic. I would like to have seen more info on this, including the exact temperature your Teflon cookware was when your chicken was exposed to the poisonous gasses and had a reaction. I would also like to see more studies supporting this and proof that this is what caused the issue with your bird, and not some other underlying issues.
Temperatures vary from mid to high heat. The out gassing is usually detectable by odor it gives off. None w/stainless steel.
We noticed every time we cooked w/new non-stick cookware our bird would go down.
Looked it up and there is a plethora of articles on this issue. Cookware companies are not going to tell you this of course. Reason I did not name the manufacturer because we didn't want to get sued.
Strange that most companies have renamed their coatings but when you investigate you find out it's Teflon. They claim to have removed the offending substance but I suspect there is something else in the coating that's deadly.
When bird had a seizure and almost died we woke up.
Usually Teflon is deadly and birds do not survive.
I can't tell you what to do but we have sided with caution and removed all non-stick and went back to stainless.
The bird got better immediately and returned to his behaviors in December prior to using the non-stick cookware.
I believe we should be cautious of new products as history has taught us again and again they usually have side effects. Some deadly.