At that age it might be trying to cool for the winter. My wild caught Cal's go off feed every November like clock work. I do things alittle different and dont force them to cool. I keep the heat on and they stop feeding and spend equal time on the hot and cool side of the enclosures.
If the clear runny stool concerns you, you might want to increase the heat some and then offer a small rodent in about two weeks...
Hope that helps some.
P.R