Vikki

Hi guys need some advise !!! My african grey called dorian keeps sqwaking .. Hes 10 years old we got him from a house that kept reptiles i.e snakes spiders and also owls about 4 months ago .. Took him to the vet hes fine health wise but wont stop sqwaking .. Weve tryed covering him up for about 5 mins that dont work weve tryed engoring him that dont work ... He sqwaks when we r out of the room please help !!!!!!as its driving me crazy !! X x