Hi, you can use this plugin :  Horse Settings

// Maximum health of the horse
"maxHealth": 484.0,

// Maximum speed of the horse overall
"maxSpeed": 16.0,

// Speed of the horse while walking
"walkSpeed": 2.25,

// Speed of the horse while trotting
"trotSpeed": 7.0,

// Speed of the horse while running
"runSpeed": 12.0,

// Turn speed of the horse
"turnSpeed": 100.0,

// Bonus to speed when on a road
"roadSpeedBonus": 1.0,

// Maximum stamina duration in seconds
"maxStaminaSeconds": 60.0,

// Bonus to stamina core regeneration speed
// when moving
"staminaCoreSpeedBonus": 1.0,

// Ratio of stamina replenish rate while moving
"staminaReplenishRatioMoving": 0.5,

// Ratio of stamina replenish rate while standing still
"staminaReplenishRatioStanding": 1.0,

// Ratio of stamina core loss over time
"staminaCoreLossRatio": 0.15,

// Maximum water depth the horse can traverse
"maxWaterDepth": 1.5,

// Maximum slope angle the horse can climb (wall climb)
"maxWallClimbSlope": 53.0,

// Maximum height the horse can step up
"maxStepHeight": 1.25,

// Maximum height the horse can step down
"maxStepDownHeight": 1.25,

// Maximum stamina core increase when in water
"maxStaminaCoreFromWater": 0.5,

// Calories needed to digest per hour
"caloriesToDigestPerHour": 100.0,

// Amount of dung produced per calorie digested
"dungProducedPerCalorie": 0.002,

// Radius for obstacle detection around the horse
"obstacleDetectionRadius": 0.38,

// Ratio of calories to stamina conversion
"calorieToStaminaRatio": 0.075,

// Ratio of hydration to stamina conversion
"hydrationToStaminaRatio": 0.05