personally i don't risk it. i think the issue is more what else is in the candle than the candle itself, like essential oils. i know that tea tree is highly toxic. i also have a parakeet, which means no teflon pans because of the fumes. (which is good cause i love me some cast iron cooking!) the way i look at it, if your lungs are roughly the size of a peanut anything like that is going to be much more of an impact. so i follow that same rule for my dragon since they are both in the same room. there are plenty of other rooms in my house on a different floor where candles or incense can be used safely with the doors to their room closed.