Hope your grey is feeling better! Some things to consider - cleaning agents, smoke, perfume type "air freshners", carpet cleaners, sprays and many other things people use in their homes can be death for a parrot. I have owned a pet shop as well as raised parrots for many years and unnatuaral products are one of the most common cause of death for parrots. I am careful to never use the plug in air freshners, perfumes, no teflon (at high temps it releases hazardous fumes), no smoking allowed, no unnatural cleaning products, no cedar bedding for anything. I use all natural cleaners, vinegar, baking soda, Murphy's Oil Soap, hot water steamers and ceramic or stainless steel cookware. I had one customer who lost all of her birds when a carpet cleaning company cleaned her carpets. The solution they used released deadly fumes. Remember, parrots bones are hollow thus the noxious chemicals infiltrate their systems quicker and more completely than mammals. Good luck with your grey!!! Keep us posted!