Thanks! The vet was very busy and only had time to give the tortoise the next antibiotic shot and some fluids. I gave him a soak afterwards (mostly water with some pedialyte) and it went very well. No more panic, and he drank deeply. I'll continue with 2 x daily soaks. Wish I'd tried it again sooner!
Did you give electrolytes or baby food in your soaks, or just water? Not sure of the trade off between getting some calories in him (still not eating) vs. the risk of getting food and stuff in his wounds.
We just used plain filtered water for the soaks. We found that sweet potato was what got him eating again - cooked it, cooled it and then put it in, and he went for it pretty quickly.