Just want to reassure you. When I volunteered at the shelter one of the things I volunteered for was the mass neutering and spaying jobs they did in the spring. I volunteered for 4-5 of them and they operated on 100s of kitties and we didn’t have any problems with any of them. Tiny kittens to big toms. It was quick and painless for the kitties. They keep them to observe the anesthesia wear off and that they are eating and drinking normally. After the surgery they were put on heating pads to keep them warm until the woke up, then moved to a crate with wet food and water. Some took longer to shake the drug but all of them were fine.