I did spays for about the first 10 years I was in practice without pre-anesthetic blood work. Since that time the technology has progressed to the point where it is an easy process and doesn't really interfere with scheduling and requiring multiple trips back to the hospital.
Is it necessary? It isn't an option in our hospital. You have to opt out and sign a waiver to NOT do it.
It is "standard of care" now in veterinary medicine.
Would you be OK without it? Probably, but if there was a problem don't blame your vet. I feel way more comfortable knowing some baseline values and in many cases can adjust anesthetic protocols (drugs used and doses) and fluid delivery to help minimize the effects of the surgery.
We delay or cancel less than 5% of our surgeries due to issues that show up on pre op blood work.
To me, the $95 respresents a little insurance and peace of mind.
Would your doctor do a procedure on you with a general anesthetic without pre-anesthetic blood work?
Doug, DVM