When Do Mares First Go Into Heat?
Updated December 12, 2023
In this Ask the Vet video, Dr. Gray and SmartPaker Dan discuss the estrous cycle in fillies and mares. Dr. Gray lists the signs that your mare is in heat, shares how old fillies typically are when they first come in season, and advises at what age you should probably start separating the fillies from the colts.
Additional Horse Owner Resources
- Understand what "mareish behavior" means.
- Watch this video for help on reducing pain for a mare in heat.
- Learn what you can expect when using mare supplements.