Hello My plum headed parrot 5 years old from today morning has become very lethargic. He is not responding to anything. And sleeping all the time with his feather puffued on his both legs. His crop is full though I only feed him in mrng and still he has the same food in his crop. His dropping is very watery and dark green in clr with a fishy smell which he never had. I feed him some uncooked rice the last night. Please suggest me what is the problem. I will be very much thankful.