If a skink has no food in it's gut it can go days, weeks, even months without needing to warm up (read up on brumation over the winter). If a skink has food in it, it needs to be able to warm up to digest the food, otherwise the food goes bad in the gut. This is very bad.
You need to make sure you always have a way for the skink to warm up in case of a power outage. For example say you feed your skink, and right after the power goes out. So keep some of those disposable heat pads on hand (never let animals come into direct contact with them though).
On trips and outings of a few hours you don't need to worry about extra heat, just make sure the skink neither gets too cold or too warm.
Melanie J. Prattwww.MelsExotics.ca
Currently living at Mel's Exotics:
BTS: Northerns, Caramel Northerns, Meraukes, Irian Jayas, Silver Tanimbars, Yellow Tanimbars
AFTs: Wild-Type, Striped, Amelanistic, Caramel Albino, Patternless, White Out