Wick’s old vet used isoflurane and there were no such instructions given to me specifically. He was dropped off at 8am and I picked him up at 3pm, so it’s possible they didn’t start the operation until 10am, but I’m unsure. Wick goes in with isoflurane to do his dentals at his old vet and those are 15min operations and I’m there the entire time. I’ve never gotten directions to abstain for 2 hours prior.
You say this is a vet you trust and have had a relationship with for a while, so it will be up to you and if you have hesitations, ask more questions! The main item is getting the gut moving after the operation. So will food be given directly afterwards, will you be told to give critical care, etc..
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.