Corns are so prolific, and snows and blizzards are so common that your breeding pair is very likely to be het for things that you don't know about. It looks like your blizzard is at least het for snow. These days, you could buy a trio of cb normal corns and almost expect to hatch out a couple different morphs from breeding the offspring back together. I hatched out a few odd looking snows about 8 years ago from a snow x reverse Okeetee breeding. On the other hand, I've also hatched out amelanistic corns that looked a lot lighter than the rest of the clutch, but darkened up after a few sheds, so they could just be albinos (it's hard to see from the picture), but that's definitely an anery. Congrats on the healthy babies and the nice surprise.