Question about high altitudes for little dogs

Deb and Ed wrote:
As someone who would spend a week skiing at Copper Mountain (base 9k ft) - the first 5 days were torture (but bliss from a skiing standpoint!) and just about the time my body finally was getting used to the altitude, it was time to leave... I would assume a dog acclimatizes to the lack of oxygen in about the same time frame?

I too have spent time skiing in summit county (3weeks a year for couple of decades in Breckinridge) and have had to deal with those first few days. I’m planning on being back in that area with Lee this fall for our sheep dog finals in Carbondale CO. I need to make sure both Lee and I are fit before going.