You've got an easy keeper. They look at a blade of grass and gain weight. Your barn neighbors are jealous of how "thrifty" your horse is — until you realize that easy keepers are actually some of the hardest horses to feed correctly.
The instinct is to just cut the hay. But that's exactly the wrong approach. Here's what actually works, based on equine nutrition science.
The #1 Rule: Never Drop Forage Below 1% of Body Weight
This is non-negotiable. For a 1,100 lb horse, that's 11 lbs of forage per day minimum. Going below this threshold causes:
- Gastric ulcers: Horses produce stomach acid continuously. Without forage to buffer it, acid erodes the stomach lining.
- Stereotypic behaviors: Wood chewing, cribbing, and weaving increase dramatically when forage time is restricted.
- Hindgut disruption: The horse's cecum needs a steady supply of fiber to maintain healthy bacterial populations.
- Metabolic backlash: Ironically, severe calorie restriction can trigger the horse's body to become more metabolically efficient, making weight loss harder.
What Actually Works: The 5-Part Strategy
1. Switch to Low-NSC Hay
NSC (Non-Structural Carbohydrates = sugar + starch) should be below 12% for easy keepers. This is the single biggest dietary lever you have. Get your hay tested — you can't tell NSC content by looking at it.
If your hay tests high, soak it for 30-60 minutes in cold water before feeding. This leaches out 20-30% of the sugars. Drain the water completely (don't let them drink it).
2. Use Slow Feeders
Slow feeder nets (with 1-1.5 inch holes) extend eating time dramatically. Your horse still gets the same amount of hay, but takes 2-4x longer to eat it. This:
- Mimics natural grazing patterns (horses evolved to eat 16-18 hours/day)
- Keeps the gut constantly buffered against acid
- Reduces boredom and stress
- Prevents gorging and the insulin spikes that follow
3. Eliminate Grain — Use a Ration Balancer Instead
Most easy keepers don't need the calories from grain at all. But they still need vitamins and minerals. A ration balancer provides complete micronutrition in just 1-2 lbs/day, at a fraction of the calories of a regular feed.
Look for a ration balancer with low NSC (<15%) specifically designed for metabolic horses.
4. Manage Pasture Access
Spring and fall pasture is the biggest risk for easy keepers. Grass sugar content peaks in the afternoon (after photosynthesis all day) and during cool nights followed by sunny days.
Strategies:
- Grazing muzzle: Reduces intake by 30-80% while allowing turnout
- Dry lot turnout: Unlimited exercise, no grass
- Early morning grazing only: Sugar content is lowest before sunrise
- Track system: A narrow path around the paddock perimeter encourages movement with minimal grass
5. Increase Exercise
This is the most underutilized tool for easy keeper management. Regular, moderate exercise:
- Burns calories directly
- Improves insulin sensitivity (critical for metabolic horses)
- Builds muscle (which burns more calories at rest)
- Improves overall cardiovascular health
Even 20-30 minutes of trotting 4-5 days/week makes a significant difference.
What Doesn't Work
- Meal skipping: Creates feast-famine cycles that trigger metabolic hoarding
- Starvation paddocks: Bare dirt lots with minimal hay cause ulcers and behavioral problems
- "Diet" feeds: Many low-calorie feeds still have high NSC. Read the label.
- Blaming the horse: Easy keeping is a genetic trait, not a character flaw. These horses evolved to survive on marginal forage. It's our job to manage their environment.
Watch for These Red Flags
Easy keepers are at higher risk for metabolic conditions. Watch for:
- Cresty neck: A hard, thick crest that doesn't soften when the horse bends is a sign of insulin resistance
- Fat pads: Behind the shoulder, over the tailhead, around the sheath/udder
- Laminitis: Any hoof sensitivity, especially in spring and fall, is an emergency. Call your vet immediately.
- Abnormal hair coat: Long, curly coat that doesn't shed (possible Cushing's disease)
If you see any of these signs, consult your veterinarian. Blood work (glucose, insulin, ACTH) can identify metabolic issues early.
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