Off topic though ... Is it usual to put a 6 day old upstairs when your downstairs? I've always kept the baby with me in it's Moses basket during the day? Seem bizarre to have a 6 day old up stairs with a dog. But perhaps I'm just over cautious?
I didn't leave my LO apart from to shower when he was that young but in fact I did leave him around my parents' dog when we stayed, never crossed my mind not to! I wouldn't leave him in say a moses basket where he could be accidentally knocked but I'd leave him on the floor knowing he'd be safe, and when he started walking they'd play alone together. The only time he's ever been hurt is when he tried to ride around on him and fell off. It might seem like an awfully irresponsible thing to do but it really never occurred to me not to. My intuition just said it was absolutely fine