In reply to Flinticus:
I walked this a couple of weeks ago and the 'bypass' path is essentially the main route, I think you would have to go out of your way to find any worthwhile scrambling.
The path is a little rocky in places but I imagine any fit and hill confident dog would have no issues at all.
Enjoy, its a real cracker of a walk (the initial ascent up A Chralaig does end, I promise!)