Be careful with it. We were out west this summer and experienced altitude sickness for the first time - it was miserable. Just to get up and pour another cup of coffee (in the RV) became a breath-taking event. Plus, our blood pressure spiked like crazy and we were taking Lisinoprils like M&M's. I think the altitude may have thrown the BP meter off calibration but my Dr. says no. Next year we are going back and I'm going to look into carrying an oxygen tank for occasional relief but will look into it further.
The dog - he loved it and got to play in snow for the first time. No issues for him, a 5 yr old Lab.