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Six ways to scale spay and neuter in Hawaiʻi, and what each would actually take

July 27, 2026 · 11 min read

I wrote recently about what the world has learned about stray dogs, and why publicly funded sterilization is the only thing that has ever actually ended the problem anywhere. That piece makes the case. This one is the part that comes after someone says yes.

Because “fund sterilization” is not a plan. A plan names a delivery model, a cost per animal, a staffing pattern, and a constraint. Below are the six models with the strongest evidence behind them, roughly ordered from highest impact to most incremental, each with what it would take to run here.

One thing up front, because it reframes everything below: the binding constraint in Hawaiʻi is not money. It is licensed surgeon hours. Every model on this list dies at the same bottleneck, and the two policy levers that would relieve it are not funding bills. I get to that at the end.

1. Saturation campaign, the Bhutan model

The most complete success anywhere. Between March 2022 and October 2023, Bhutan ran its Nationwide Accelerated Dog Population Management and Rabies Control Programme and sterilized its entire free roaming dog population, the first country ever to do it.

The verified figures: 61,680 dogs sterilized, of which 56,251 were free roaming. 58,581 dogs vaccinated against rabies, about 95%. 32,544 pet dogs microchipped and registered. All of it delivered through 217 clinics by 12,812 personnel, including 9,036 de-suups, the trained civilian volunteers known as Guardians of Peace. Total cost was 295 million Ngultrum, about $3.55 million.

That works out to roughly $58 per animal sterilized, and I want to flag how easy it is to get this number wrong, because I did at first. Bhutan’s full partnership with Humane Society International goes back to 2009 and covers around 150,000 sterilizations. If you divide the accelerated program’s $3.55 million by that larger lifetime figure you get about $24 per animal, which is a real number divided by the wrong denominator. The honest per animal cost of the two year push is about $58.

The actual lesson is not the price. It is the division of labor. Volunteers did the catching, holding, recovery, record keeping, and release. Veterinarians did surgery and nothing else. That is why the number is $58 instead of several hundred.

What it would take here:

  • A baseline population survey per island. This is the single biggest gap right now, and nothing else on this list can be budgeted without it. Bhutan did a nationwide count of pet and free roaming dogs before starting. Nobody can defend an appropriation for a population nobody has measured.
  • A civilian corps analog: National Guard youth programs, DOCARE, Hawaiʻi Community Corrections work lines, UH students, or a formalized rescue volunteer registry, trained before launch rather than recruited during it.
  • 4 to 8 surgeons working in rotation per island phase, roughly two weeks per district.
  • State level executive sponsorship, Governor or Department of Agriculture, because this only works when it is mandated rather than requested.
  • A planning estimate of $1.5M to $3M per island for a two year push, front loaded.

2. Targeted saturation TNR for cats

Not TNR everywhere. TNR flooded into one defined geography until sterilization coverage crosses a threshold, then moved to the next. Concentrated intervention consistently outperforms scattered, sporadic TNR, and that difference is the whole ballgame.

The threshold itself is worth stating carefully, because it gets quoted loosely. You will often see 70% cited, which comes out of rabies and dog population work, where 70% vaccination coverage is the established herd immunity target. The free roaming cat literature points higher. Roughly 80% sterilization is widely treated as the threshold for stabilizing a colony, and population viability modeling suggests something in the 93% to 95% range is needed for sustained long term reduction.

Córdoba, Spain is the best current example of doing it at city scale: one of the most extensive citywide TNR programs anywhere, 225 cat groups brought into a single management framework, about 95% sterilization coverage achieved over four years, and an estimated 70% of expected population growth prevented.

The number that matters for planning is the high one. A program that sterilizes 60% of a colony and declares victory has bought a slower increase, not a decrease.

What it would take here:

  • Colony mapping and a caregiver registry per target zone. The Waiʻanae Coast, Puna, Ocean View, and Kalihi are the obvious candidates.
  • 40 to 80 traps per active zone, plus transport vehicles.
  • Surgical capacity of 60 to 100 cats per day during a zone push.
  • A paid community organizer per zone. Caregiver trust is the rate limiter here, not surgery. Colonies are fed and monitored by people who have to decide you are worth cooperating with, and that relationship is not volunteer work you can schedule.
  • An ear tip, microchip, and tracking database protocol, so you can actually prove coverage crossed the threshold instead of asserting it.
  • Roughly $60 to $90 per cat all in.

3. MASH clinics

MASH stands for mobile animal surgical hospital, and the important detail is that there is no vehicle. Staff transport surgical equipment to an existing building, a church hall, a gym, a community center, and stand up a temporary surgical space inside it. That distinction matters because it is what makes the model cheap to start: no capital campaign, no surgical suite to build, no custom vehicle to buy.

Hawaiʻi does not have to imagine this one. PETFIX already runs it on Hawaiʻi Island, hosting large community clinics in Keaʻau and Ocean View nearly every month. Each clinic is staffed by 20 to 25 volunteers and 2 to 4 veterinarians, some of whom fly in from the mainland, and costs upward of $5,000 once you count vet fees, medications, supplies, microchips, and vaccines. They performed close to 7,500 surgeries in 2025.

That is the model working, in state, right now, on the island with the least surgical infrastructure. Any Oʻahu west side program should start by asking PETFIX what it costs them and what breaks.

What it would take here:

  • Two portable surgical kits per island, roughly $25K to $40K each: tables, autoclave, anesthesia machines, monitors, clippers, packs.
  • MOUs with venues: churches, community centers, gyms, homestead halls, DHHL facilities.
  • A standing agreement with a local clinic for post operative emergencies. This is the one people skip, and it is critical precisely when the surgical team is not local and flies out on Sunday night.
  • Storage and interisland shipping logistics. Young Brothers freight is a real line item, not a rounding error.
  • 20 to 25 trained volunteers per clinic day, scheduled as repeats rather than recruited fresh each time.
  • Roughly $5K to $8K per clinic day, producing 40 to 80 surgeries.

4. Fixed clinic plus mobile unit hybrid

The Wisconsin trajectory is the instructive one. The Fix Is In started MASH style in 2012 after ASPCA training, moved to a mobile surgical unit in 2018 serving more than ten counties, then established a stationary clinic, completing roughly 42,450 surgeries across ten years before closing over staffing challenges.

That ending is the warning label, and Hawaiʻi is already living the first draft of it. Hawaiian Humane’s spay and neuter centers have been running temporarily limited hours because of staffing constraints, with operating days fluctuating based on who is available, one veterinarian handling 50 to 60 procedures on an open day, and appointments booked weeks out.

A building does not produce surgeries. A surgeon does. Capital is the easy half of this model and the half that gets funded first, which is exactly how you end up with a facility you cannot staff.

What it would take here:

  • Capital of $1.5M to $3M for a West Oʻahu or neighbor island facility, or $250K to $400K for a mobile surgical unit.
  • 2 to 3 full time surgeons plus 6 to 10 technicians per site. This is the actual binding constraint, not the building.
  • A housing subsidy or relocation package. Without one, recruitment fails here regardless of salary, and the salary is not the part you can fix with a grant.
  • An ongoing operating subsidy of $400K to $700K per year, because high volume clinics serving low income clients generally do not break even and are not supposed to.

5. Voucher subsidy through private practice

Already proven in state, and the cheapest thing on this list to scale because it uses surgical capacity that already exists.

Neuter Now lets qualifying low income owners redeem $20 certificates at participating clinics against services that typically run up to $200, with up to ten certificates a year, covering the pre surgery exam, anesthesia, surgery, and stitch removal. Feline Fix waives free roaming cat fees entirely, including anesthesia, surgery, microchip, ear notch, and the FVRCP vaccine, through City partnership funding.

There is a quiet failure mode in the current design worth naming. Participating clinics set their own additional fees, and surcharges for animals over three years old or over 45 pounds are common. Read that against who the program is supposed to reach. The rural, large, adult, unaltered dog is the exact animal driving the population problem, and the exact animal a surcharge prices back out of the program. The subsidy reaches the easy cases and stops at the hard ones.

The fix is structural, not financial: pay a flat, all inclusive reimbursement with no surcharges permitted, somewhere around $150 to $200 per animal.

What it would take here:

  • A recurring county or state appropriation. Both programs have already lapsed and been restored at least once on funding cycles, which tells you the line item is not considered load bearing.
  • Neighbor island expansion, where the equivalent is currently thin or absent.
  • Enrolled private clinics willing to accept the reimbursement rate, which is the weak point and the reason only nine clinics on Oʻahu participate today.
  • No capital cost at all. This is the lowest overhead option on the list.

6. Veterinary student and volunteer service partnerships

Hawaiʻi has no veterinary school. Every surgeon here was trained somewhere else and chose to move, which means the labor supply is an import problem, permanently.

Service learning partnerships are the standard answer. Rural Area Veterinary Services runs on volunteer veterinarians and technicians from across the country and has treated more than 175,000 animals since 2003, delivering over $34 million in no cost care in underserved rural communities while training students. Large scale service learning TNR interventions have produced measurable benefits on both sides at once, for the community and shelter, and for students, who were substantially more likely to have performed spays and neuters during their clinical year.

That second half is the part worth taking seriously. A student who does high volume surgery in Waiʻanae is a candidate to practice in Waiʻanae later.

What it would take here:

  • Formal agreements with mainland veterinary schools. Colorado State, UC Davis, Oregon State, and Washington State are the natural partners.
  • Housing and airfare for rotating teams, roughly $2K to $4K per student block, and the dominant cost of the model.
  • Hawaiʻi licensed supervising veterinarians on site, which loops directly into the constraint below.
  • Year round scheduling, so it is a supply line rather than a summer spike.

The constraint that governs all six

Every model above fails at the same place: licensed surgeon hours in Hawaiʻi. Money is the easier problem. Two policy levers matter more than any single program on this list, and neither one is an appropriation.

Licensure pathways for visiting veterinarians. Hawaiʻi already has three openings in statute, and none of them was built for what these programs actually do.

HRS §471-2 exempts an out of state licensed veterinarian practicing under a sponsor and the indirect supervision of a Hawaiʻi veterinarian as part of an emergency response, for no longer than twenty one consecutive days. That is real, and it is also an emergency response provision. A recurring charitable clinic is not an emergency, and reading it as one is how a program gets a cease and desist instead of a permit.

The courtesy permit under §471-9.5 runs thirty days, renewable once, capped at sixty total days in any twelve month period, requires a sponsor, and is written for temporary practice incidental to an out of state practice. The relief permit under §471-9.6 carries the same thirty and sixty day limits, but is designed to cover the practice of a veterinarian who is absent, and more than two requests within a two year period is prima facie evidence that the permittee is actually practicing in the State and needs a full license.

Line those up against a MASH rotation that wants the same visiting surgeon back four times a year and the collision is obvious. None of the three instruments contemplates a recurring, high volume, charitable surgical clinic staffed by out of state volunteers.

So there are two moves, in order. First, request a direct written opinion from the Board of Veterinary Medicine on whether a charitable high volume clinic qualifies under the courtesy permit. If it does, the MASH and student models get dramatically cheaper overnight. If it does not, the second move is a targeted statutory amendment creating a charitable clinic permit, and that is the single highest leverage bill anyone could introduce on this issue. It costs the state nothing.

Veterinary technician scope of practice. Bhutan’s result was only possible because non surgeons did everything except cutting. Any Hawaiʻi program should be designed that way from day one, and scope of practice determines how much of the work a technician is allowed to absorb. Widen it and every surgical hour buys more animals.

A realistic sequence

For a rural push, in order: run the baseline population survey first, because nothing else can be budgeted or defended without it. Then targeted TNR zones with MASH rotations as the delivery mechanism. Flat rate vouchers as the owned animal backstop. Student partnerships as the labor supply. And the licensure question moving in parallel the entire time, because it gates the cost of everything else.

How I checked this

A note on sourcing, since a lot of numbers appear above.

The Bhutan figures, the Córdoba and cat sterilization thresholds, the PETFIX operations, and all three Hawaiʻi statutes are verified against primary or near primary sources, and two things changed in the process. The per animal cost of the Bhutan campaign is about $58, not the roughly $24 that circulates when the accelerated program’s budget is divided by the full partnership’s lifetime sterilizations. And the commonly quoted 70% TNR threshold appears to be a dog and rabies figure applied to cats, where the literature supports something closer to 80% for stability and above 90% for sustained reduction.

The Fix Is In totals and the RAVS figures I have not independently confirmed. Treat them as directionally right and verify before citing in testimony.

Every Hawaiʻi dollar range here is a planning estimate built from the model’s known cost structure, not a quote or an appropriation request. They are meant to be argued with. If you have real numbers from running any of this in state, I would genuinely like to see them.

Sources

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