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Observation
What you see. The starting point for addressing any equine health related issue is your observation.

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Stallion Fails to Get an Erection or Mount Mare, Lacks Libido

Summary

Stallions fail to get an erection for a variety of reasons. It is a common problem in younger, inexperienced stallions. Gentle and consistent stallion handling walks the line between maintaining safety and control but not intimidating the stallion.

Most erectile dysfunction problems in the stallion are not physiologic but behavioral and can be solved with modifications in technique. There are a variety of pharmacologic approaches to increasing libido and the ability to get and maintain an erection.

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your role

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What To Do

If you lack experience in breeding or stallion handling, seek help from your vet or an experienced stallion handler. Ensure that your handling and breeding technique is correct before you start. Ensure that the mare is in full estrus through good heat detection and teasing.

What Not To Do

Do not become overly aggressive or frustrated with the stallion. A stallion's fear of being reprimanded is a common cause of loss of libido.

your vet's role

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Your vet will ensure that the mare is in heat and that the stallion does not have obvious physical problems that are interfering with breeding. They will likely review your stallion handling and suggest changes. If all of these more conservative options have been tried, they may suggest drug protocols for hand breeding or standing collection and artificial insemination.
Questions Your Vet Might Ask:
  • Does the stallion seem healthy and the external genitalia normal?
  • How old is the stallion?
  • Has the stallion ever been bred before?
  • Are you sure that the mare is in heat?
  • Describe how you are managing and handling the stallion.
  • When was the stallion last bred?

Author: Doug Thal DVM Dipl. ABVP