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Therapeutic Effectiveness of a Dietary Supplement for Management of Halitosis in Dogs

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Reproductive Control in Dogs with Emphasis on Anti-GnRH Immunocastration and Its Behavioral Effects.

María José Ubilla^1,2, Manel Lopez-Bejar³, Daniela Siel^4,5

¹Escuela Medicina Veterinaria, Facultad de Medicina Veterinaria y Agronomía, Universidad de las Américas, Avenida Manuel Montt 948, Providencia, Santiago 7500000, Chile.

Veterinary Sciences

|January 28, 2026

Summary

Immunocastration, a vaccine targeting gonadotropin-releasing hormone (GnRH), offers a promising alternative to surgical castration for dog population control. It effectively suppresses reproductive hormones and may have fewer negative emotional side effects than traditional methods.

Keywords:

GnRH vaccine animal welfare behavioral effects dog overpopulation immunocastration surgical sterilization

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Area of Science:

Veterinary Science
Animal Reproduction
Immunology

Background:

Dog overpopulation presents significant public health and animal welfare concerns.
Surgical castration, the primary method for dog reproduction control, has associated risks and limitations.
Immunocastration targeting GnRH offers a potential alternative to surgical sterilization.

Purpose of the Study:

To review the potential of immunocastration as an alternative to surgical castration in dogs.
To examine the mechanisms, applications, and behavioral outcomes of GnRH-based immunocastration.
To contextualize findings with evidence from other species.

Main Methods:

Literature review of studies on immunocastration in dogs and other species.
Analysis of physiological and behavioral effects of GnRH vaccination.
Evaluation of reversibility, cost-effectiveness, and suitability for mass implementation.

Main Results:

Immunocastration effectively suppresses reproductive hormones and gonadal function in dogs.
Observed behavioral changes include reduced roaming, aggression, and sexual mounting.
Evidence suggests potentially fewer negative emotional side effects compared to surgical castration.
Cross-species data support the effectiveness and welfare implications.

Conclusions:

Immunocastration is a viable and promising strategy for dog population management, especially where surgical infrastructure is limited.
It offers potential advantages in terms of reversibility, cost-effectiveness, and reduced negative emotional impact.
Further research is needed to standardize protocols and assess long-term outcomes in diverse populations.