So for the past few months, squeekers has has a play mate in another cockatiel we bought from a local breeder. She was a cinnamon pearl named cinnie(short for cinnamon). She had a night fright a few weeks ago and broke her neck unfortunately. Now squeekers is sleeping in his food dish, and gets very aggressive when first approached. I understand he may be a bit upset about cinnie being gone, but how does one help this behavior?