Our dog has started this new habit of greeting me as I come through the door. It starts in his usual happy way - smiling, waggy tail, dropping onto his belly and rolling over. Then as I make a fuss of him, he sometimes stiffens up and growls apprehensively (not aggressively). I give him space and he comes back to me often even more affectionately than the first time!
What is going on? It almost feels like a game, but I'm not sure.