toad's slow death

[Poly]

I'd rather let nature run it's course

What!?

Nature?

Excuse me, but you just said that:

container was a poor substitute for a habitat, it was a plastic shoebox

I'll tell you one thing, that's not nature! "Letting nature run it's course" would have been to allow the toad to live in it's nature habibitat, or something we call... "nature", not a shoe box. I garranty, in nature it would have survived, but you confined it to poor conditions, and subsequently poor care, and this is the reason for it's death.

I've learned from then and have a close to proper habitat set up for my remaining toad

Okay, and another thing... Close to proper? You should have a proper enclosure set-up before you get the amphibain, not when you have it.

Can you post a photo of it's current enclosure?

And is this "remaining toad" in good health?

Excuse my ridicule, I'm no expert of amphibains, but I myself have never captured any WC amphibain without first knowing 100% how to care for it, and I have certainly never killed any amphibian. So I find it disturbing how over 30 amphibains have died while in your care...