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How often does a mare go into heat? I have a rescue mare in heat with two rescue geldings. One of the geldings is acting out of character. Will that change when the mare is out of heat?

Last Updated: January 05, 2010

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We would like to direct you to our resources about the mare's reproductive cycle at: Mare Reproduction. To learn more about the behavior of horses as it pertains to reproduction, please review: Horse Breeding Behavior. In some cases, geldings may exhibit more intact stallion-type characteristics when mares are in heat. This behavior may subside once the mare has gone out of heat.

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