The only pet sitter I have used in the past was my mom. She would keep a little daily diary and it was cute. She wrote about the things she did with the dogs, what time she fed them, how they sat on the floor and drooled at her while she had a bowl of ice cream, etc. I have saved these diaries and shall always treasure them. I think that had your pet sitter's diary been a little different you too might have wanted to save them. Unfortunately she may have gone a little too far with some of her comments. I think I would just sit down with her and as politely as possible just go over some of her notes. If you don't get a good feeling during this discussion then I'd say it's time to find someone else. Go with your instincts.