well, in my opinion if we put axies in the fridge , it will slow down he´s metabolism, and he will not poo a lot more, so when I had a constipated axie I left him in the tank so his metabolism didn´t slow down and worked as it should, he pooed almos all night and all over the tank, he was only pooing sand, now his alright, and learned that sand it´s not a good food. I´m not saying to put elmo in the tank cause if he have anything contagious, he might pass on to elsa, but leave him in the fridge ,for this night, with the temperatures that I advise you before , and don´t try to feed him.
I hope he will feel better, and again let us know how things are going.
Don´t give up...