I had the same thing happen with my Argentine boa and my female Dumeril's boa a week ago. I came home from a 7 day trip (during which my sister kept an eye on the critters), to find that my Argie had completely finished her shed, and the Dumeril's was in blue. I pretty much expected the Dum to shed since she's a yearling and was about due, but wasn't expecting the Argie to shed quite so soon. Luckily, her humidity was high and she shed in one complete piece!!