In reply to Frank R.:
Not strays, but farm dogs tagging along on ski touring ascents in Italy...once, just beneath the summit of Cima dell'Accla after a very long ascent in fresh snow 2 guys came up super fast with a Labrador trailblazing in front of them...not even bothering to exploit the skin track...then it came past me and made short work the last vaguely exposed scramble to the summit and got there first. Then the 2 guys arrived. I complimented them on the mountain nous and stamina of their dog. "Not ours," they said. "It followed us up from the car park!"
Then on another occasion a big, friendly Bernese mountain dog tagged along with us (after charging up from the nearby farmhouse and scaring the pants off of us as we were getting ready)... When we got the summit there was another party just preparing to leave...the dog went back down with them! You could just tell the beast was in his own back yard & knew exactly where it was all day.
Talking about dogs and mountain nous...I was at Rifugio Marco e Rosa...very high...3600m on Piz Bernina...sunning myself outside...the warden had some wolf of a dog way up there... A helicopter came in and landed...with the engine still roaring and the rotors spinning the dog trotted down to the landing pad and put its giant forepaws up onto the side of the helicopter to see who was inside!
Post edited at 14:35