minecraft-src/assets/minecraft/equipment/saddle.json

{
  "layers": {
    "camel_saddle": [
      {
        "texture": "minecraft:saddle"
      }
    ],
    "donkey_saddle": [
      {
        "texture": "minecraft:saddle"
      }
    ],
    "horse_saddle": [
      {
        "texture": "minecraft:saddle"
      }
    ],
    "mule_saddle": [
      {
        "texture": "minecraft:saddle"
      }
    ],
    "pig_saddle": [
      {
        "texture": "minecraft:saddle"
      }
    ],
    "skeleton_horse_saddle": [
      {
        "texture": "minecraft:saddle"
      }
    ],
    "strider_saddle": [
      {
        "texture": "minecraft:saddle"
      }
    ],
    "zombie_horse_saddle": [
      {
        "texture": "minecraft:saddle"
      }
    ]
  }
}