diff --git a/multi-file/schemas/pet.yaml b/multi-file/schemas/pet.yaml
index 48da816..af6b725 100644
--- a/multi-file/schemas/pet.yaml
+++ b/multi-file/schemas/pet.yaml
@@ -1,6 +1,5 @@
 type: object
 required:
-  - id
   - name
 properties:
   id:
@@ -12,3 +11,6 @@ properties:
   tag:
     type: string
     description: Optional tag for the pet
+  breed:
+    type: string
+    description: Breed of the pet