Ephedra, thanks for recommending that book. I am only part way through but it has really helped me understand her in a high arousal situation, so much so is kept below that level much more. I've noticed when we work the course she is no longer trying to get to other dogs but is just focussed on instruction. She even waits before she comes out of the tunnel and that was her point of no return before, she would scream through it and either go completely mad or pester other dogs
My BC x Belgian Terv girl could only roll to her right too. My Wheaten girl was a bendy lass though, she could roll and spin in either direction and switch quickly between the two sides as well but she was always a smarty pants.
There have been some studies done on 'pawedness' in dogs. There are tonnes of links if you Google, here are just two:
Rather annoyingly I recently read a really interesting article which discussed which jobs/roles etc left vs right pawed dogs and vice versa might be better suited to. They did a small study and found for example the more search and rescue dogs were (can't remember but think it may have been right pawed) whereas other working dogs in different roles were left pawed. Wracking my brains to try and think where I read it now.
Interestingly my extremely fear aggressive big lad was definitely left pawed, which would correlate with the second article I linked to.