The Colonial Spanish Horse evolved as one of the most metabolically efficient equines on earth, surviving for centuries on forage that would starve less adapted animals. From desert scrub to mountain meadows, these horses thrived on whatever vegetation their environments provided. This remarkable efficiency presents the primary nutritional challenge for modern owners: preventing obesity rather than maintaining condition.
Forage provides the foundation of every Colonial Spanish Horse's diet, often constituting the entire nutritional intake without supplementation. Quality grass hay should comprise daily intake at roughly 1.5-2% of body weight, typically 10-18 pounds depending on the individual. Many horses maintain excellent condition on even less. Rich hays like alfalfa typically provide far more nutrition than necessary and may cause problems.
Pasture access requires careful management despite the breed's efficiency. Improved pastures common to modern horse properties provide far more nutrition than the sparse vegetation these horses evolved eating. Unrestricted grazing quickly leads to obesity, metabolic disorders, and laminitis risk. Grazing muzzles, limited turnout on grass, or maintenance on dry lots with controlled hay feeding prevents dangerous overconsumption.
Grain and concentrate feeds are unnecessary for nearly all Colonial Spanish Horses and may cause genuine harm through excessive calories. Even horses in moderate work typically maintain condition on forage alone. Only horses in extremely heavy work, lactating mares, or those genuinely struggling to maintain weight should receive supplemental calories, and then in very modest amounts.
Vitamin and mineral supplementation addresses nutrients that hay alone may lack without adding significant calories. A quality vitamin-mineral supplement or ration balancer provides essential micronutrients appropriately. Regional soil conditions affect mineral content in hay, so local recommendations may guide specific supplementation needs. Salt should be available free-choice to encourage adequate water consumption.
Feeding schedules should emphasize consistency and appropriate restriction rather than abundance. Measured hay amounts work better than unlimited access for most Colonial Spanish Horses. Slow feeders extend eating time when using hay nets, supporting digestive health while controlling intake. Two meals daily typically works well.
Seasonal adjustments address changing conditions. Winter may require modestly increased hay to fuel heat generation in cooler climates, though increases needed are typically less than for other breeds. Summer often requires reduced feeding, especially with any pasture access. Any dietary changes should occur gradually.
Weight management represents the critical nutritional focus. Body condition scoring provides objective assessment, targeting scores of 4-5 on the 9-point Henneke scale, perhaps slightly leaner than typical recommendations. Cresty necks, fat deposits, and difficulty feeling ribs indicate dangerous overweight conditions requiring immediate dietary restriction. Colonial Spanish Horses should appear lean and efficient, not rounded.
Metabolic health connects directly to weight management. Obesity dramatically increases risk of insulin resistance, equine metabolic syndrome, and laminitis in these efficient horses. Maintaining appropriate condition throughout life provides the best prevention. Once metabolic issues develop, strict ongoing management becomes necessary.
Special nutritional needs arise in specific situations. Senior horses may need adjusted diets as dental efficiency decreases. Growing youngsters require adequate nutrition for development without overfeeding. Pregnant and lactating mares need increased nutrition carefully balanced against the breed's efficiency. Veterinary guidance helps address individual situations appropriately.