I had my jungle carpet python for a month now. I give him the same type of enclosure as my Irian Jaya with the same devices/thermostat brand.
Here are both their enclosures. I give the same thermal gradient for both of them.
IJ eats like a champ, the JCP hasn't eaten since I got him(4 to 5 weeks). However, the one that doesn't eat has grown more! Hes becoming thicker and more muscular by the day.
Comparing him from when I first got him to today.
A month ago - big enough to eat fuzzy mice
Today - Big enough to eat hopper mice