Hello,
Welcome to Frog Forum.
We will try to help.
I do not have , nor have I ever cared for a toad
However, lets try to get an answer for you

Have you been dusting his food with calcium and vit supplements ?

If so, what are your using and how often.

Do you see any of these symptoms?
Tremors
Is he retaining fluid
Has he pooped - any digestive slowing or changes ?
Does he still 'right' himself the same way ( have you noticed any posture changes)
Above- are all symptom of a calcium deficiency.

Can you post a photo of the toad and the enclosure he is in?

Your frog needs to be accurately identified for proper care.

I will move this tread to the toad section so those here on FF who care for toads can help