The sheep dog had a consistency, and a touch of style. Nice to have closure. Dunno what to say about "Buggeroff". I have wondered if stopping and fussing the daft creature would work. It has enough bulk to bring you off if you properly tangled with it. Damaged bike and wounded dog & Paul are rotten outcomes but quite possible.
I used to get chased regularly by a collie and one day I thought sod it and pulled up to let him catch me the little bugger turned round and went home. You’ll miss that dog Paul.