Axolotl not eating

[DeCypher]

Hi y’all. So I have four axolotls all very happy and healthy with good parameters. One of them started eating less and less worms and now she hasn’t eaten in 2 days. Water parameters are fine, no gravel no impaction risk, temps are *slightly* higher due to the heat wave. It gets up to 71F at times. I have been doing frozen bottles of water rotated. Should I tub her and keep her cold? She just will not eat. All the others are eating as usual. What’s going on? She’s starting to become skinnier, she was a very healthy weight a week ago. She started only eating one worm a day, and now it’s dropped to zero. What do I do?? I can’t think of anything else other than tubbing. I’m worried there’s a problem that is not visible.

 

[wolfen]

have you tried other food sources?
is there any type of substrate in the tank? ie.. sand etc..
are there any hides/caves in the tank?
apart from losing weight is there any other changes in appearance or movement?
is she in the same tank as the other axolotls or separate?