for the last two winters our piggies have been inside due to all the snow. this cant happen now that we have six. instead the three cages all have a hutch cover, they live in a place well kept from th wind, they are on flleece at the moments,normally have hay in their egloo but because they have been recently changed to fleece they have a towel in their egloo. we may be getting to heat pads but that is just a maybe. i just want to get peopples opinions are whats best to keep them warm and if that is sufficient enough. thanks in advance