diff --git a/openapi_first/templates/vet_app/openapi.yaml b/openapi_first/templates/vet_app/openapi.yaml
index b829490..8db3d93 100644
--- a/openapi_first/templates/vet_app/openapi.yaml
+++ b/openapi_first/templates/vet_app/openapi.yaml
@@ -58,6 +58,21 @@ components:
           x-order: 2
           x-label: "Details"
 
+    Call:
+      type: object
+      x-resource: calls
+      x-primary-key: _received_at
+      x-display-format: "{sound}"
+      x-list-columns: [sound]
+      properties:
+        sound:
+          type: string
+          enum: [woof, meow, coo]
+          x-label: "Sound"
+          x-order: 1
+          x-filterable: false
+      required: [sound]
+
     Parent:
       type: object
       x-resource: parents
@@ -369,6 +384,19 @@ components:
             $ref: '#/components/schemas/ErrorBody'
 
 paths:
+  /calls:
+    get:
+      summary: Stream random animal sounds via SSE
+      operationId: stream_calls
+      x-sse: true
+      responses:
+        '200':
+          description: SSE stream of random animal sounds
+          content:
+            text/event-stream:
+              schema:
+                $ref: '#/components/schemas/Call'
+
   /parents:
     get:
       summary: List parents (paginated)
@@ -984,24 +1012,6 @@ paths:
           $ref: '#/components/responses/ValidationError'
         '500':
           $ref: '#/components/responses/InternalServerError'
-  /calls:
-    get:
-      summary: Stream random animal sounds via SSE
-      operationId: stream_calls
-      x-sse: true
-      responses:
-        '200':
-          description: SSE stream of random animal sounds
-          content:
-            text/event-stream:
-              schema:
-                type: object
-                required: [sound]
-                properties:
-                  sound:
-                    type: string
-                    enum: [woof, meow, coo]
-                    description: Random animal sound
 
   /appointments/{id}:
     get: