Fruits and vegetables

✅ The Bottom Line Horses can safely enjoy most fruits and vegetables like apples, carrots, and watermelon as treats. However, for a horse’s sensitive digestive system, the “10% rule” is vital—treats should never exceed 10% of their daily forage. Avoid the “Nightshade” and “Allium” families (onions, garlic, potatoes, and green/unripe tomato parts), which are toxic …