Evidence & Outcomes

Why Removal Counts Do Not Prove Damage Reduction

Counts measure activity. Outcomes need denominators, baselines, and follow up.

Record reviewed: Sep 4, 2026

An operator photographing captured hogs inside a corral trap while a truck tailgate holds a data sheet, trail cameras, GPS unit, and field records.

Because a count is a numerator. To evaluate an outcome you also need a denominator and a baseline: over what period, across what area or how many sites, with how much effort, compared with what damage measured before and after, and with what recurrence or complaint pattern afterward. Without those, a large number of removals is evidence of activity, not of damage reduction.

What outcome evaluation needs

Public program reporting frequently supplies the first item and rarely all of them:

A count of removals, tails, or animals handled.
A time period, so rates rather than totals can be compared.
Area or site count, so a county and a single pasture are not compared as equals.
Effort, such as equipment deployed, days active, or personnel time.
Baseline damage measured before the work, using the same method afterward.
Recurrence, complaints, or another program specific outcome measured after the work ended.

What the record shows

Two very different kinds of source point at the same gap.

Texas public programsActivity measures are published, consistency is not

TSSWCB reporting and other Texas public program materials publish funding, participation, trap inventory, acres, tails or removals, and similar activity measures. The measures are not consistent enough across programs and years to infer a universal effectiveness rate from them.

Systematic review, 2024Most damage assessment has been qualitative

A 2024 systematic review of 209 wild pig damage studies reported that 84 percent of damage assessments were qualitative, and called for stronger integration of population measurement with quantified damage measurement. That is a finding about the research literature's methods, within the scope the authors defined.

Why it matters

Activity numbers are the easiest thing to collect and the easiest thing to over read. They answer what was done. They do not answer whether the damage that prompted the work went down.

Notably, the Dallas solicitation asked for a plan with measurable damage reduction goals. That is a buyer asking for the harder measurement, which is exactly the gap the research literature describes.

This is not a claim that removal does not work

Nothing here says removal is ineffective, and nothing here says any specific Texas program failed. The point is narrower: activity and outcome are different questions, and most available reporting answers the first one. Where outcome measurement exists, it should be read on its own terms and with its own scope.

Limits and Scope of This Evidence

Public program reports were designed for accountability and funding, not for cross program effectiveness comparison.
The 2024 review describes the studies it included, not the performance of any program.
Absence of quantified outcome data is a measurement gap, not evidence in either direction.

What This Page Does Not Claim

That removal is ineffective, or that it is effective, at reducing damage.
That any named program, agency, county, or operator failed or succeeded.
That the 2024 review evaluated Texas programs.
That TSSWCB, Texas A&M, TPWD, or any agency endorses this page.

Sources

Record reviewed September 4, 2026. Documents linked below were public at that date. Contract requirements belong to the buying jurisdiction named, not to operators generally.

Texas State Soil and Water Conservation Board, 2025 Annual Report (PDF)
tsswcb.texas.gov/sites/default/files/files/docs/About/2025%20Annual%20Report%20for%20Web.pdf
Systematic review of wild pig damage assessment (2024)
doi.org/10.1007/s10530-024-03263-z
City of Dallas RFCSP BTZ25-00028917 scope of work
govtribe.com/file/government-file/5-01-feral-hog-control-and-abatement-services-scope-of-work-dot-pdf

City of Dallas RFCSP BTZ25-00028917 scope of work: Third-party mirror of the City of Dallas solicitation document, not a City-hosted copy.

Operator Perspective or Correction

If a document here is out of date, mischaracterized, or missing context, send the correction with its source to data@texashogdispatch.com. Field context from working operators is welcome. Nothing sent is published as an endorsement, and we do not publish proprietary methods, customer identities, property locations, or private price sheets.

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