Horse Side Vet Guide ®

Equine Health Resource

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

Code Yellow - Contact Your Vet at Your Convenience for an Appointment

Code Yellow - Contact Your Vet at Your Convenience for an Appointment

    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.


    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.


    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.

    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.

    Author: Doug Thal DVM Dipl. ABVP


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