I had some luck with finding 2nd gen Snows on the first day, but two of them were killed and the one survivor is reserved for a friend. I bred my own, but I actually want to continue those lineages, so I'm not going to freeze them.

Yesterday, I did another round of Snow hunting, and boy was that hard! If there even were Snows to find, they were either CBs, or really messy. After a few hours I got lucky and found some pretty 2nd gens, so don't give up, they're out there somewhere.