User blog comment:Lord Loss/Discussion of the Week: Portable 3rd Subspecies/@comment-3062343-20120527020930/@comment-3062343-20120528095614

I don't think that the increased energy requirements would be much of a problem for Agna Sub, as the Tundra has a plentiful supply of food for it (Anteka, Popo, Bullfango, maybe Urcusis etc.). A higher metabolism would most likely be a beneficial thing in this case, as higher metabolism = more heat produced. I think Lord Loss was getting more at surface area: volume ratio rather than heat capacity.