Her only complaint is that he looked thin! Luna was not a very good cook, however, so she had no means to feed him save for dragging him out to the diner. Otherwise, she was pretty fond of him, herself. Back home she hadn't been able to just be herself, she had to be the princess. Here, she was getting used to being herself but it was still hard to let go of somethings.
"Yes, though I don't have any servants to treat them...." She frowned a bit as her wings closed but she took off, circling around slightly in the large space before landing close to Harry with a bright smile.