Tibbe grinds/rubs against furniture edges and sometimes rubs/scratches his muzzle against the protruding corner of two walls in the hall bath, always reminded me of cat behavior. Even got into frequent head rubbing when he was 4 or 5 years, so, since he had accompanying GI symptoms and cyclical lethargy followed by next day friskiness, he was tested extensively for liver shunt/MVD and MVD Dx. made, hepatic diet started. I used to think this was liver shunt or microvascular dysplasia type rubbing but as he has no more of those symptoms other than this occasional body/head rubbing - especially when he wants to go potty outside or is feeling happy or frisky - I've decided it may not be. Could just be an acquired habit from when he was so ill.
https://vcahospitals.com/know-your-p...ular-dysplasia