Mares in Heat: What’s Normal, What’s Not?
Karen Hopper Usher
May 5, 2026
Mares get a bad rap for recalcitrant estrous behavior, but hormones and tumors could also be at play.
Mares get a bad rap for recalcitrant estrous behavior, but hormones and tumors could also be at play.
What medications do veterinarians use in broodmares and are they safe? Learn more in the Spring 2026 issue of The Horse.
How to decide if your older mare is a good candidate for breeding and improve her chances of success.
With careful management and feed selection, owners can provide broodmares the nutrients they need to support foal growth. Here’s what one equine nutritionist recommends.
How to ensure the late-gestation mare is getting enough nutrients to meet both her needs and those of the developing fetus.
Take a closer look at what’s new in assisted equine reproduction and what that means for horses and humans.
Late in pregnancy, mares’ abdominal space is limited, and they can experience colic.
Here’s how to properly condition your mare before, during, and after her pregnancy.
An equine veterinary podiatrist says ice might help address this horse’s foot pain but won’t solve the main problem.
Learn how veterinarians diagnose, treat, and manage mare reproductive problems in this Ask TheHorse podcast episode. Sponsored by Equithrive.
Vegetable- and marine-based sources can provide your horse with essential omega-3 fatty acids. Consider these factors when choosing an omega-3 supplement for your horse.
Post-foaling, this type of colic can be life-threatening to broodmares and their foals.
If a mare’s behavior issues are related to her reproductive cycles, suppressing estrus might help.
Keep your broodmare at a healthy weight to help ensure her and her foal’s safety during gestation and foaling.
The final 100 days of gestation bring their own unique developments, changes, and challenges. Get tips to help your mare’s third trimester run smoothly.
Recognize the important role progesterone plays in breeding a mare and the resulting pregnancy. Sponsored by Sidekick Animal Health.
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