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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 development in different species.

Latest News

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.

Dr. Bechert's latest SpayVac Publication now online

Aug. 29, 2018 Dr. Bechert's publication  IgG4/7 responses correlate with contraception in mares vaccinated with SpayVac. It will appear in print in Theriogenology Volume 121,  November 2018, Pages 168-174 issue.

First Vaccine Batch Manufactured

July 2, 2018.  Madison, WI and Victoria BC Canada.  The first production batch of SpayVac pZP vaccine has been produced.  It is currently going through validation and quality assurance testing.  No vaccine will be released until activity is confirmed.

SpayVac® pZP Vaccine Development

Urban Deer

Up to 5 years of efficacy in single-dose 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 two 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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