wd's still operate at a lower temp than bd's and bt's
had our first frost yesterday (micro climate), wd's still active in outside pen
i ran babies in heated pen for 6 weeks then into indoor pen just heated water
if they are active and eating it means they are warm enough
if they stop eating and try to dig into substrate then they are too cold
young wd's may try hiding if there is a lot of movement around enclosure as it is part of their instinct to keep predator safe
behaviour is a good indicator of what is going on with your animals