Water

Why Water Matters More Than Anything Else

Water isn’t just a nutrient for the horse—it’s the first nutrient. Before we ever talk about hay, grain, supplements, or feeding programs, we have to talk about hydration. A horse can survive weeks without feed, but only a few days without water. Their entire digestive system depends on it.

Here are some key numbers that help put it into perspective:

Daily Water Needs

Most adult horses drink 5–15 gallons of water per day, depending on:

• Temperature

• Activity level

• Diet (dry hay requires more water than pasture)

• Individual metabolism

Performance horses, lactating mares, and horses in hot climates may need 20+ gallons a day.

Why Hydration Is Non‑Negotiable

Water drives:

• Digestion and movement of feed through the GI tract

• Saliva production (horses make up to 10 gallons of saliva a day while eating forage)

• Temperature regulation

• Joint lubrication

• Muscle function

• Nutrient absorption

When water intake drops, everything slows down—especially the gut.

Hydration & Colic Risk

Dehydration is one of the biggest contributors to impaction colic.

When the large colon doesn’t have enough water, feed material becomes dry, heavy, and difficult to move. Even mild dehydration—just 2–3% body water loss—can increase the risk of impaction.

Cold weather, travel, stress, and sudden changes in routine are all common triggers for reduced drinking.

Individual Needs Matter

Just like with feed, every horse is an individual.

Some horses naturally drink more. Some need encouragement. Some prefer warm water. Some are picky about bucket cleanliness. And some metabolically sensitive horses may drink differently depending on their forage type or salt intake.

Recognizing these differences is the foundation of good nutrition.