Can i ask those of you that have more experience, if you have fleece lining plus fleece snuggle pods / dens (with roof and small door) in an indoor run (C&C), is this enough to keep the piggies warm overnight; the temperature in the room is around 14 at the moment in the middle of the night which feels cold to me so I was wondering if I needed to add hay to their fleece den which seems to defeat the object ! additional info at the moment piggy is on his own due to bereavement so no-one to snuggle if this makes a difference.