PetPyometra is a bacterial infection that fills the uterus with pus, and in an unspayed female dog or cat it's a genuine emergency — untreated, it's frequently fatal. The fix is an urgent spay to remove the infected uterus, usually with IV fluids, antibiotics, and a hospital stay. It's one of the more common serious emergencies in intact females, and one of the strongest arguments both for spaying and for having insurance in place. Here's the realistic Canadian cost and how coverage works.
What it costs in Canada
| Scenario | Typical cost (CAD) |
|---|---|
| Emergency exam + diagnostics (bloodwork, X-ray/ultrasound) | ~$300–$800 |
| Pyometra surgery (spay of infected uterus) — routine/stable | ~$1,500–$3,500 |
| Pyometra surgery — emergency hospital / after-hours | ~$3,000–$6,000+ |
| Hospitalization + IV fluids (per day) | ~$200–$600/day |
| Complicated / septic case (ICU, extended stay) | Can exceed $6,000–$8,000 |
| Post-op meds + recheck | ~$100–$300 |
These figures are estimates for general guidance only, not quotes, compiled from publicly available Canadian veterinary pricing. Pyometra cost swings widely with how sick the animal is on arrival: a stable early case caught at a day practice sits at the low end, while an after-hours emergency in a septic patient needing ICU care runs to the top. Cats are usually somewhat cheaper than dogs, and large dogs cost more. See How we estimated these costs.
With insurance vs paying out of pocket
| Scenario | You pay | Insurer pays |
|---|---|---|
| No insurance | Full $2,000–$6,000+ emergency bill, up front | $0 |
| Comprehensive policy (in force before diagnosis) | Deductible + your co-insurance share (e.g. 10–20%) | Pays the covered balance — often the majority of the bill |
| Accident-only policy | Full cost — pyometra is an illness, not an accident | $0 |
| No policy until after diagnosis | Full cost — now a pre-existing condition, excluded | $0 |
What pyometra is — and why it's an emergency
Pyometra develops in unspayed females, usually in the weeks after a heat cycle, when hormonal changes let bacteria colonise the uterus. The uterus fills with pus and can rupture, spilling infection into the abdomen and triggering sepsis. Signs include lethargy, drinking and urinating more, a swollen belly, loss of appetite, and sometimes a foul vaginal discharge. It moves fast — this is not a "watch and wait" condition, and delay raises both the risk and the cost.
What drives the bill
Three things push pyometra into the four-figure range:
- It's surgery, not medication. The definitive treatment is an emergency spay to remove the infected uterus — more complex and higher-risk than a routine spay because the tissue is fragile and inflamed.
- It's usually after-hours. Pyometra rarely waits for business hours, so many cases land at a 24-hour emergency hospital, where fees run higher.
- Sick patients need support. IV fluids, antibiotics, pain control, and one to several days of hospitalization add up quickly, and a septic patient may need ICU care.
Dogs vs cats, and open vs closed pyometra
Cats get pyometra less often than dogs and are usually a bit cheaper to treat given their smaller size, but the emergency and the surgery are the same in principle. Vets also distinguish open pyometra (the cervix is open, so there's visible discharge and it's often caught earlier) from closed pyometra (no discharge, harder to spot, and more dangerous because the uterus can rupture). Closed cases tend to be sicker on arrival and cost more.
Does pyometra surgery cost vary by city?
Yes — more than a routine procedure would, because so much of the bill is emergency and hospital time. After-hours and ICU fees run higher in major metros (Toronto, Vancouver, Calgary, Ottawa, Montreal), where most 24-hour referral hospitals are. A stable case handled at a daytime GP clinic in a smaller market can sit well below a septic after-hours case in a big city. The bigger levers, though, are how sick your pet is on arrival and whether the surgery happens during regular hours — not the city itself.
How insurance covers pyometra — and the spay angle
This is an important one to get right. Pyometra is covered by comprehensive (accident-and-illness) pet insurance as an illness — it is not caught by the breeding/pregnancy exclusions that some owners assume, because it isn't a whelping complication. The two conditions are the usual ones: the policy must have been in force before the diagnosis (a pyometra diagnosed before you enrol is pre-existing and excluded), and any waiting period must have passed. On a policy that was already active, you'd pay your deductible and co-insurance share and the insurer covers the rest — often the large majority of a $3,000–$6,000 bill.
There's also a permanent prevention that insurance can't match: spaying eliminates the risk entirely. A routine spay costs a fraction of pyometra surgery and removes the organ that gets infected. If your female is intact and you're not breeding her, that's the cheapest possible "coverage" against this particular emergency — and insurance handles everything else. See best pet insurance in Canada for how the plans compare.
How we estimated these costs
The dollar figures here are estimates for general guidance, not quotes, compiled from publicly available Canadian veterinary and emergency-hospital pricing. Real costs vary by clinic, province, your pet's size, and how advanced the infection is — confirm with your own vet. Sources we drew on:
- Canadian pyometra and emergency surgery pricing: Pawlicy — Pyometra in dogs and general Canadian emergency-vet cost ranges.
- Emergency and hospitalization context from our own emergency vet visit and pet hospitalization cost guides.
Considering insurance?
Pyometra is a $2,000–$6,000 emergency that strikes without warning in unspayed females — and it's fully treatable as an illness under comprehensive coverage, as long as the policy was in force first. Spaying prevents it outright; insurance handles the rest. Compare Canadian plans that cover emergencies like this.