
The leg thing could be episodic falling perhaps? The head rubbing could be SM, but also rule out less scary stuff like ear mites, knots in ears pulling at skin, or just having wet ears - I used to have one that always and only ever did that after he'd been bathed, before I dried him. I'm not an expert though, I've just owned 3 Cavaliers which thank god have never shown symptoms of either SM or falling, so I'm sure more knowledgable people will be on soon.