Feeding a horse is one of the most rewarding parts of horse ownership, but it is also one of the easiest places to make a mistake. You want to give your horse the best, but between conflicting advice, flashy feed bags, and your horse’s big, begging eyes, it is easy to fall into common traps. Whether you are new to horses or have been around them for years, these feeding mistakes are more common than you think. Let us walk through the biggest ones so you can keep your horse healthy, energetic, and thriving.
1. Overfeeding Grain and Underfeeding Forage
The number one mistake is thinking a horse needs a big scoop of grain to be happy or energetic. Horses are designed to eat forage, mostly grass or hay, for most of the day. Grain is a concentrated energy source and should only be a small part of the diet. Overfeeding grain can lead to colic, laminitis, and behavioral issues like hyperactivity or even refusing jumps in performance horses. A good rule is to feed at least 1.5 to 2 percent of your horse’s body weight in forage daily. Grain should be fed by weight, not by volume, and only as needed for work level or body condition.
2. Ignoring the Importance of Forage Quality
Not all hay is created equal. Many owners grab whatever bale is cheapest or most available without checking for mold, dust, or weeds. Poor quality hay can cause respiratory issues, choke, or simply lack the nutrients your horse needs. You should always open a bale and inspect it before feeding. A hay analysis is the best way to know exactly what you are feeding. If your horse is a performance horse, like an eventer, their diet needs to be precise. Check out what eventing horses eat to see how forage quality plays a key role in their energy and recovery.
3. Feeding Too Much or Too Little Protein
Protein is essential for muscle development and repair, but more is not always better. Excess protein is excreted as urea, which can dehydrate your horse and put extra strain on the kidneys. On the other hand, too little protein can lead to poor muscle tone, a dull coat, and slow hoof growth. Most mature horses in light to moderate work do fine on a 10 to 12 percent protein hay or ration. Growing horses, pregnant mares, and hard-working athletes may need a bit more. Always match protein to your horse’s actual workload and life stage.
A horse’s stomach is about the size of a rugby ball and can only hold 2 to 4 gallons. That is why small, frequent meals are better than one or two huge ones. Grazing for 16 to 18 hours a day is their natural rhythm.
4. Making Sudden Feed Changes
Horses have sensitive digestive systems. Switching feeds or hay abruptly can upset the gut microbes and cause colic or diarrhea. Any change, whether it is a new brand of grain, a different type of hay, or even adding a supplement, should be done gradually over 7 to 10 days. Mix the old and new feed together, slowly increasing the new while decreasing the old. This gives the hindgut bacteria time to adjust. If you are adjusting your horse’s diet to prepare for a competition season, plan ahead so you are not making changes the week of an event. A consistent routine is also important for eventing horse training schedule success.
5. Not Providing Enough Water or Salt
Water is the most important nutrient, yet it is often overlooked. A horse at rest drinks 5 to 10 gallons a day, and that number can double in hot weather or when working hard. Always have clean, fresh water available. In winter, water can get too cold and horses may drink less, leading to impaction colic. Heated buckets or tank heaters help. Salt is equally critical. Horses need sodium and chloride, especially if they sweat. Provide a plain white salt block or loose salt, and avoid mineral blocks that are hard to lick enough of. If your horse is not drinking, try adding a little salt to their feed or offering warm water.
6. Feeding by Sight Instead of by Weight
Using a coffee can or scoop to measure grain is a recipe for inconsistency. A scoop of oats weighs differently than a scoop of pelleted feed. Feed by weight, using a kitchen scale or a feed scale, at least until you know what a proper portion looks like. Over time, you can eyeball it, but start with accuracy. The same goes for hay: a flake can vary from 3 to 8 pounds depending on how it is baled. Weighing hay for a week will teach you what your horse actually eats. This is especially important for performance horses where body condition directly affects performance and signs of lameness can sometimes be linked to improper weight and nutrition.
You do not feed the bag, you feed the horse. Every horse is an individual with unique needs.
7. Forgetting About Parasite Control and Dental Health
Even the perfect diet is useless if your horse cannot chew properly or is losing nutrients to worms. Dental issues like sharp points or hooks can cause a horse to drop feed, choke, or simply not grind hay well enough. Have your horse’s teeth checked by a vet or equine dentist at least once a year. Fecal egg counts help determine if your deworming program is working. A horse with a high parasite load will look poor no matter how much you feed. If your horse is a competition horse, their overall health and comfort also affect their willingness to work. For example, a horse with dental pain may refuse jumps or resist the bit. Keep up with routine care so your feeding efforts actually pay off.
Feeding a horse well is not complicated, but it does require attention to detail. Stick to good quality forage, feed by weight, make changes slowly, and always provide fresh water and salt. Your horse will thank you with a shiny coat, good energy, and a happy attitude. If you are ever unsure about your horse’s diet, ask your veterinarian or an equine nutritionist. They can help you create a plan that fits your horse’s age, workload, and health needs.
