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SpayVac pZP vaccine for wild horses, burros and deer - learn more here.


SpayVac® is a humane, non-lethal, environmentally friendly, single-dose innovation used for overabundant, mammalian wildlife.

SpayVac® need

Humans have had a profound impact on Earth’s ecosystems

 The Anthropocene is proposed as the current epoch, which is “viewed as the period during which human activity has been the dominant influence on climate and the environment”.  Many wildlife species, even if they are considered endangered, are overabundant in the ever-shrinking habitat ranges they occupy.

SpayVac®: A humane alternative

Overabundant species, even native ones, can reduce biodiversity by monopolizing resources, spreading infectious diseases, and changing species composition or relative abundance.

Click on the links below to learn about SpayVac pZP vaccine development in different species.

Latest News

SpayVac makes the Cut as a Finalist in the Governor’s Business Plan Competition

February 23, 2019, Madison, WI: SpayVac for Wildlife Inc has been accepted as one of the finalists for the 16th Annual Governor's Business Plan competition.  https://govsbizplancontest.com/.  The contest links up-and-coming entrepreneurs with a statewide network of community resources, expert advice, high-quality education, management talent and sources of capital. 

SpayVac presentations at upcoming wildlife conferences

February 22, 2019.  [1]  Dr. Bechert’s abstract has been accepted for oral presentation at the International Urban Wildlife Conference in Portland, OR this summer.   [2] Mr. Mark Fraker will be giving a talk titled “Single-dose, multi-year immunocontraception using SpayVac®“ at the 18th Wildlife Damage Management Conference held at Mississippi State University on 26 March 2019: http://www.cfr.msstate.edu/worksho…/wildlifedamage/index.asp"

Public Lands Council Awards SFW Inc. $50,000

October 18, 2018.  SpayVac-for-Wildlife Inc. receives $50,000 grant from the Public Lands Council to help advance SpayVac® pZP vaccine for horses to market.

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SpayVac® pZP Vaccine Development

Urban Deer

The only pZP vaccine for horses  to demonstrate up to 5 years of efficacy in single-dose is SpayVac® in  trials with white-tail and fallow deer species.

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Other Mammalian Populations

SpayVac® has been tested in several invasive or overabundant mammalian wildlife species.

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Wild Horses

SpayVac® has been tested in three trials in horses demonstrating reduced fertility rates over a 2-5 year time frame with a single dose.

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SpayVac® blog posts


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