Has anyone tried putting a heat rock in with degus? Was thinking about trying a heat rock or heat lamp just to add an extra bit of heat to the degu cages on one or two levels just in case they get too cool as it is starting to get mighty cold outside..... The heat rock for reptiles I need to check what temp it gets up to but it is made of cement so I figured if I wrapped it in fabric or fleece they could snuggle up to it but wouldn't be able to chew it up. It would also be a natural thing to them as rocks are part of their natural environment...

Degus actually prefer cooler temperatures . There's no need for supplemental heating (and heat rocks, by the way, aren't considered safe for any animal--reptiles included). You can, however, add extra nesting material and/or some straw. But really, they're exposed to much colder conditions in the wild.

Ok - was just mostly worried about nights as I can't check on them then (work nights). The house is usually around 60-65 degrees at night and 65-70 degrees in the day in the winter. Didn't want frozen goos.... They have multiple hideaways and plenty of hay available.... Thinking about putting some paper towels or toilet paper in there for them to shred and add to their "nests". Should be a riot watching them destroy those

Those temperatures are actually pretty ideal. Degus tolerate cold very well but are sensitive to heat. So you run into more problems during the summer.

also, degu cant sweat so high tempratures can be v. dangerous