I set up a camera when I needed a bird sitter and got to see what she was doing with my bird. Even though I trusted her, I know that the budgies are not people birds and wanted to make sure she was following my guidelines. You may want to try it just to make sure it's not something she's doing.
He could just not like the sitter, too. My aunt's husband's bird would turn into psycho bird whenever he had to spend time near people he didn't like, but he only ever went to attack her husband and never the other people.




