Last week my Whiteface Cockatiel flew into our instapot that had pork oils in it from dinner. It was still cooling down. Luckily it was luke warm. I rushed and washed with dawn soap. Did it again the next day because he was smelling like pork roast. Now his feathers are a dark grey. Not signs of oil and doesnt smell like the pork. Any ideas why his feathers are a darker grey now?