Pumpkin/assets/datapack/data/minecraft/cat_variant/british_shorthair.json

{
  "asset_id": "minecraft:entity/cat/cat_british_shorthair",
  "baby_asset_id": "minecraft:entity/cat/cat_british_shorthair_baby",
  "spawn_conditions": [
    {
      "priority": 0
    }
  ]
}