I cannot offer you advise as I am not a vet, however, I have had many spays and neuters done and other assorted surgeries in the past.
At my vet's clinic, pre-op bloodwork is mandatory.
IV fluids are only mandatory if the animal is 7 years or older. This is something you must decide for yourself after discussing with your vet if he/she thinks it is required for your specific pet and why.
Good luck...
