No the vet didn't know too much either, it's not very common knowledge. She did suggest making sure he drank a suitable drink afterwards to replenish anything lost. I think they do Recharge for Greyhounds or you can make up your own drink in specified quantities of salt, sugar and water. No advice about diet though.
Apparently it's the 2nd biggest cause of death in Sighthounds after bloat.
I was wondering if a higher carb diet would be better?
It's a mystery!