Pet surgery: what to expect before, during, and after

Before the day of surgery

Most surgical procedures, from a routine spay or neuter to a more involved repair, start with a pre-op exam and bloodwork. The exam confirms your pet is healthy enough for anesthesia right now, not just generally healthy, and the bloodwork checks organ function specifically, since the liver and kidneys are what clear anesthesia drugs from the body. Older pets or pets with a known condition usually need a more thorough workup before anything is scheduled.

This guide covers general information about how surgical visits typically go. It isn’t a substitute for a conversation with your own vet about your pet’s specific procedure and health history.

You’ll also get fasting instructions, almost always no food after a set time the night before, since a full stomach raises the risk of complications under anesthesia. Water is often fine up until the morning of the procedure, but follow whatever your clinic specifies rather than a general rule.

What happens on the day

Drop-off is usually early in the morning, and most clinics ask you to leave a phone number where you can be reached throughout the day. Once your pet is checked in, a vet tech will place an IV catheter, which does two things: it gives the team a way to administer anesthesia safely and a route for fluids during the procedure to support blood pressure.

During surgery itself, a dedicated staff member typically monitors vital signs the entire time: heart rate, oxygen levels, blood pressure, and body temperature. This monitoring is what catches a problem early if one comes up, and it’s worth asking a clinic directly whether a dedicated monitor is standard practice for their procedures, not just something reserved for the most complex cases.

The stages, roughly in order

Stage	What happens
Pre-op exam and bloodwork	Confirms the pet is healthy enough for anesthesia today
Fasting	No food for a set window beforehand, per clinic instructions
Check-in and IV placement	Catheter placed for anesthesia and fluid support
Surgery	Vitals monitored continuously by a dedicated staff member
Recovery room	Pet is watched closely as anesthesia wears off
Discharge	Pet goes home with pain medication and written aftercare instructions

Why cost varies so much between procedures

A routine spay or neuter sits at the lower end of surgical pricing, largely because it’s a predictable, well-established procedure. Costs climb from there based on complexity, how long the procedure takes, whether specialized equipment or imaging is needed beforehand, and whether an overnight stay is required. A straightforward same-day procedure and a multi-day orthopedic repair are not close to the same bill, even though both are technically “surgery.” Ask for a written estimate before you commit, and ask specifically what would change that estimate, since complications discovered mid-procedure can shift the final cost.

Recovery at home

Most pets come home groggy and a little unsteady for the rest of the day. Expect written instructions covering pain medication, activity restriction (often a crate or a small, calm space rather than free run of the house), and a cone or recovery suit to keep your pet from licking or chewing at the incision. Follow the activity restriction closely even once your pet seems back to normal, since internal healing lags behind how your pet feels on the outside, and too much movement too soon is one of the more common reasons a healing incision reopens.

Watch the incision daily for redness, swelling, discharge, or a smell that wasn’t there before, and call the clinic if anything looks off rather than waiting for a scheduled recheck. Most practices build in a follow-up visit or at least a phone check within a week or two to confirm healing is on track.

Questions worth asking before you schedule

• How many of this specific procedure has the surgeon done, and would they refer a more complex case out
• What does the estimate include, and what would push the cost higher
• Will my pet stay overnight, and if so, is a staff member present at all times
• What does a normal recovery look like, and what’s a warning sign that means calling right away

If you want to compare surgical practices across the metro, our full list of veterinary surgery providers in Denver is at /category/veterinary-surgery/. Our methodology page explains how we score and rank listings, and our home page has the full directory if you’re still narrowing down where to book.