Not to worry! When Groucho was neutered the vet kept him overnight. We missed him more than a lot. The procedure went well with no problems but I did feel better with him spending the night at the kitty hospital with trained folks to keep an eye on him just to make sure there were no complications. When I picked him up the next morning, the staff told me how much they loved him and assured me that he had a comfortable night. When I picked him up he would not let me put him down or into his carrier for quite a while. Don't worry, Vixen is fine and will be very excited to see Meowmie!