I was thinking that the pet bars/cures would have to be smaller than the actual group members because 1). they're not important 2). to avoid confusion. And maybe even a smaller font for the pets. And I was thinking that when there are no pets in the group, it should resize back to normal or something.
These are just some thoughts. Also, doing it this way would/could be better because the player could resize it if they don't want to see the pet info.