Strangely enough we met a dog coming down the 18th of december when we were going up the Vacas valley. His companions told us that this dog had summited, but all news sources like the BBC vbelow only mention another dog/summit.
Anyway, at least one dog summited...
Dog conquers 7,000-metre mountain
Updated 28 January 2004, 18.15
Rubia the golden retriever has boldly gone where no dog's been before.
The two-year-old pooch has just climbed the highest peak in Latin America - Argentina's 7,000-metre Aconcagua.
She had been training for the feat since she was seven months old and was accompanied by two humans, who were really impressed by her performance.
Rubia was kitted out with jackets and boots for the challenge, which had a serious purpose in checking out how rescue dogs operate at great heights.

Rubia makes light work of the snow
Rubia was roped to one of her companions throughout the climb.
She was fed a special diet and had cream rubbed into her paws to prevent injuries.
"The dog would react and recover better than we would," said one of Rubia's fellow climbers.