minecraft-assets/data/minecraft/wolf_variant/pale.json

{
  "assets": {
    "angry": "minecraft:entity/wolf/wolf_angry",
    "tame": "minecraft:entity/wolf/wolf_tame",
    "wild": "minecraft:entity/wolf/wolf"
  },
  "spawn_conditions": [
    {
      "priority": 0
    }
  ]
}