Our vet doesn't believe in taking food away from rabbits before surgery as they cannot vomit. The food percausion is to prevent vomiting. Check with your vet, if he is rabbit savy he may not want you to eliminate the food. Also check and see if the rabbits are related by blood if there is a discount for using the same surgical kit. I know when you have litters of kittens neutered they use the same kit. Don't let them jump around for the first 12 hours but after that they really bounce back fast. Have some hay to put in their cage at the vet if possible, they always come around quickly and are looking for something to settle their stomachs. My vet lets me stay with our rabbits before surgery right up to the time they put them under. I just hold them, they give them a little shot and when they are drowsy the tech takes them. This really helps to prevent stress. All depends on the clinic, but you can certainly ask. We have a great vet clinic, if you are nuerotic enough they will even let you stay in the staff room over night with your animal in a portable cage, and just lock off the rest of the clinic. Good luck