I would just bring a variety of stuff. You could even pack a diaper/tote bag. Stuff I might bring:

*Pellets (if your bunny eats pellets)
*Hay
*Water (Can be served in a water bottle or a kennel bowl that attaches to the door)
*Greens (to coax him to eat)
*Blankets
*A stuffed animal to snuggle with (completely optional, but some buns might find it reassuring)

Please keep in mind that vets normally have you fast your rabbit before the appointment, and your bun will most likely be groggy and not want to eat or drink afterwards, so the food is kinda more for coaxing him to eat something afterwards. So the food is kinda optional, but I’d try and find a way to bring water.

Good luck! I hope the neuter goes well!

I was told that because a rabbit cannot throw up you don’t have to fast them and withhold food before they go to surgery. They should have food in their stomach as it can cause even more stress on their digestive system if they fast. My bunny Kraken is getting neutered in a week and they asked that we bring food as when he is wakes up from surgery they want to offer him food and water so your vet might also want to do that. And everything MoxieMeadows listed is great! I didn’t even think about bringing a stuffed animal for comfort

Good luck Blue! 

Rabbits should not be fasted before surgery. Let him have whatever food he normally eats before his appointment. Since you are traveling some distance, if you plan to bring some greens with you (which is a good idea, for him to have afterwards at the vet) you will need to put them in a cooler to keep them fresh and crisp. If you feed him some greens right before you leave, you could wet them down a bit, which will give him extra moisture, and he might not need any extra water before the surgery. Or you could wait until you arrive at the vet and see if he wants any water. Use whatever he is used to, whether it’s a bottle or a bowl.

Some rabbits get their appetites back quickly after surgery but for others, it takes a while. Make sure that you have his favorite fruits and veggies on hand for him to eat when he gets home. Even though you don’t want to give a rabbit too much fruit, if he doesn’t seem keen on eating much else, the fruit would be good to encourage him to start eating again.

I didn’t mean long fasting like dog or cats. My vets prefer I don’t feed Moxie for about 30 minutes before going under anesthesia. Because obviously empty stomachs for buns is a big no-no. I think it really depends on the vets. Most vets prefer the bun eating right up to the surgery. I know I didn’t sound very clear though there! Sorry!

Bunnies shouldn’t fast before surgery, but there shoudn’t be food in their mouths/esophagus when they are going under anesthesia. I’m thinking that’s why Moxie’s vet says not to feed Moxie for 30 mins before a procedure.

My vets hasn’t said anything specific to me about that, but here you always check your bun in at around 8 and the procedure is done later in the day, so staff can of course remove all food 30 minutes before the bun goes under.