Help!!! Gray Tree Frog VERY sick!

[Cliygh and Mia 2]

It could very well be a calcium deficiency. The Upland chorus frog I owned lost motor function of her rear legs without calcium as well

[HerpetologyBarbie]

Vitamin/Calcium deficiency related paralysis comes on slower and often shows other symptoms such as a loss of appetite, lumps on the spine and difficulty moving which gives you time to action it well before the related and irreversible paralysis sets in.

The sudden onset and the rapid decline in condition over a period of a few hours suggests otherwise.

I hope you've found a herp vet to help you out, they will be your best defence against what ever is ailing your little froggy.