Ok, long story short: Last year from November to April, my PacMan frog ate irregularity, sometimes not eating for week(s) at a time. Come spring, she ate and ate and ate.

Same thing this year, she has simply slowed down. The ambient room temperature and tank temp and humidity hasn't gone down. the room humidity has gone down by 7-10 degrees because the furnace heats the air and burns off the moisture.

Do frogs relate to reduced solar periods, i.e. the ambient room lighting is much lessened through the windows in the winter.