That is interesting. As a kid growing up we were always told not to eat snow if lost in the bush but to try and melt it first. I believe that had to do with the snow potentially lowering your core body temperature.
I just googled it though and something that seems to be a common thread that makes sense to me for both kids and dogs is that snow will pick up the same air pollutants that rain will so it would make sense to me that eating it could cause stomach upset.
Mindy Tri - Feb/97
Max - Ruby - Sep/08
Rylie - B&T - June/09