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When Do Horses Stop Growing?



When Do Horses Stop Growing

Horses are majestic animals that have always captivated the hearts of different people for centuries. As a horse owner, you are concerned about your horse’s health and well-being. One of the essential aspects of taking care of your horse is to know when your horse will stop growing. Knowing the growth stages of your horse is crucial, as it helps in providing the right care for your animal.

If you’re a first-time horse owner or have had horses for years, you might be wondering when do horses stop growing? Let’s delve into the details.

First Stage

The growth stages for horses can generally be divided into three stages: the first stage is the first 12 months, where the horse grows rapidly. Within this phase, fillies(Girl horses) reach their maximum height at around 12 months while Colt(Male horses) grow an inch or two taller than fillies at 12 months, but both genders grow wider during this stage.

Second Page

In the second stage, from 12 months to 24 months, the growth rate significantly slows down, and the horse will still be widening out nevertheless. This stage can become affected by nutrition as proper feed is crucial because horses need adequate nutrition to develop strong bones.

Third Stage

The last growth stage of horses takes place from 24 months to five years. This stage is instrumental in determining the height and physical maturity of the animal. Horses, after two years of age, do not grow taller. Instead, they start developing muscular strength and physical power, especially those which are bred for sport. The horse’s skeletal system becomes fully developed just before five years of age, and they have reached physical maturity by that age.

However, horses continue to mature when it comes to temperament and training, even past their physical maturity and skeletal growth development. Horse owners should keep in mind that the environment and care play a critical role in a horse’s growth and development. Proper feeding, exercise, and veterinary care are essential in ensuring the well-being of horses.

Hormones play a significant role in the growth and development of horses, just as other animals. The pituitary gland is primarily responsible for hormone secretion, which drives the growth stages of the horse. Researchers have established that light exposure also affects the release of hormones. The more exposure horses get to natural light, the more secretion of hormones responsible for growth. Consequently, horses that are kept indoors may not grow the same as those who are outside.


Horse owners must understand and align their expectations with their horse’s growth stages. Knowing when a horse stops growing is crucial in providing proper care and nutrition for the animal. It’s crucial to give special attention to the first stages of growth, as proper nutrition during those phases is critical. Vaccinations, de-worming, veterinary checkups, and regular exercise play a crucial role in securing your horse’s health.

Overall, taking care of a horse is not just about feeding them and providing a safe place. It’s about understanding their growth and development, and knowing each horse is an individual with their unique growth patterns.

I am Tommy, an avid equestrian who is passionate about the lifestyle. Writing for an equestrian blog has been a lifelong dream of mine, as I have been around horses my whole life. My mission is to share all the knowledge and experiences I have gathered throughout the years in order to help others reach their goals in this amazing sport. My dedication and enthusiasm towards horses and all things related to them never cease to amaze me!

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