Hi, Sorry to hear about Dory's paralysis problem! How awful to have found him like that!
A couple of things come to mind... Someone on another rabbit group has a bunny who recently had trouble with his back legs. He was finding it very hard to move around and keep himself clean - he too was incontinent. These are classic EC signs, but of course the signs are also of spine injury.
The bunny on this other group has a history of EC so was treated with Panacur, as before in his life. But at the same time his owner took him for some acupuncture treatment. She was quite dubious, but has been absolutely astounded by her rabbit's improvement. Even during his first session he showed results. He's had a few sessions now and I believe he's gained back the use of his legs. He did a binky the other day, as I remember, and nolonger has incontinence issues. The owner really thought she had to consider letting her bunny go before she took him for acupuncture. I've heard a very similar story from another experienced rabbit owner too. I don't have experience myself here, but thought you'd be interested to hear about this.
I must also say that I don't want to fill you with false hope. As others have said there could be long term paralysis issues if the reason for this is a spinal injury - if the cord is severed, etc. But I thought it would be worth you checking this alternative treatment out if you can.
Fingers crossed for Dory x