I've had this leopard gecko for about a month and a half. She ate solidly, her tail plumped nicely and she was very, very enthusiastic about her food. I fed her a range of diet from crickets, (didn't like the mealworms) a calciworms/phoenix worms, and then a once-a-week treat of waxworm. Fed every other day.

I got her with another female who is just fine (but a much pickier eater and much more finnicky about being picked up.)

So I fed her some calciworms 2 days ago--again, healthy eating behavior--the other female refused, but then was probably still full. It has been hot, but I've been running the air conditioning and monitoring the temps. Because it got too hot, I turned off the UTH and attached a fan to the "cooling" part of the heat regulator. (the room was running 90 degrees even with the heater off). The temps sank to about 88. I monitored them throughout the day since I have other reptiles and I work from home.

The water dried out in one day flat, though... and so when I checked her yesterday night, she was upside down. In a panic, I looked up what I could do for her and then started her in a delicup with some water, but she was so weak, I had to be careful she didn't drown.

It looks like she passed an impaction? this morning (poo in the cup) (though I keep her on eco earth), so maybe she ate something too big. (though I'm not sure since the calciworms weren't huge, though it looked like she could have swallowed one wrong, but she was fine when I put her in the tank--I checked on her later and she looked fine.)

She can't move that well, and I moved her to UTH in a quarantine tank so she's half on and half off, but she's not doing great. Barely breathing, opening and closing her mouth like she can't breathe and only moving her head. There is no sign of infection or mouth rot... so I'm really confused.

I looked up other leopard gecko diseases, but they are much slower to kill.

I'm not sure if she's going to make it at this stage because it's that bad.

I can't figure out what could make her sick that fast though. Can heat kill that quickly? What could kill so quickly?