i brought my gps in from outside at the end of septemver and put them in a kind of 'outhouse', then last week i brought them into our conservatory. now our conservatory is not heated, so I'm guessing the temp in there is gonna get mighty cold in the winter. what is the lowest temp a guineapig should be kept at? I'm trying to find a spot inside for them, but with it being an old unheated house (we have a wood burning stove which only sends heat to a few rooms) most rooms are pretty cold. will they be ok?