I'm starting this thread to post things that are toxic to parrotlets.
If you are unsure about something being toxic, post saying you are unsure. This is for yours and my benefit.
If you have read somewhere that something is toxic but is not widely known, please post the source so others can confirm the information.
Remember also, when feeding or using anything on your parrotlet or any other pet, if you are unsure, ask your vet or do not use it unless it has been verified by reliable source. The saying "when in doubt, leave it out", is the safest way to go.