diff --git a/openapi_first/templates/vet_app/__init__.py b/openapi_first/templates/vet_app/__init__.py
index 35e79af..f83e342 100644
--- a/openapi_first/templates/vet_app/__init__.py
+++ b/openapi_first/templates/vet_app/__init__.py
@@ -24,9 +24,8 @@ library API surface.
 OpenAPI x- extension fields demonstrated
 ----------------------------------------------------------------------
 
-Schema-level extensions (mark a schema as a UI resource):
+Schema-level extensions (display metadata for resource endpoints):
 
-  ``x-resource``         (REQUIRED) Maps schema to URL path segment
   ``x-primary-key``      (REQUIRED) Primary key property name
   ``x-display-format``   (REQUIRED) Human-readable label template
   ``x-list-columns``     (REQUIRED) Columns for the datatable
diff --git a/openapi_first/templates/vet_app/main.py b/openapi_first/templates/vet_app/main.py
index d3a9663..8bab330 100644
--- a/openapi_first/templates/vet_app/main.py
+++ b/openapi_first/templates/vet_app/main.py
@@ -31,16 +31,12 @@ from starlette.middleware.cors import CORSMiddleware
 
 from openapi_first.app import OpenAPIFirstApp
 import routes
-from sse import start_worker, stop_worker
-
-
 @asynccontextmanager
 async def lifespan(app):
-    start_worker()
     try:
         yield
     finally:
-        stop_worker()
+        pass
 
 
 app = OpenAPIFirstApp(
diff --git a/openapi_first/templates/vet_app/openapi.yaml b/openapi_first/templates/vet_app/openapi.yaml
index 8db3d93..7888d29 100644
--- a/openapi_first/templates/vet_app/openapi.yaml
+++ b/openapi_first/templates/vet_app/openapi.yaml
@@ -60,7 +60,6 @@ components:
 
     Call:
       type: object
-      x-resource: calls
       x-primary-key: _received_at
       x-display-format: "{sound}"
       x-list-columns: [sound]
@@ -75,7 +74,6 @@ components:
 
     Parent:
       type: object
-      x-resource: parents
       x-primary-key: id
       x-display-format: "{name}"
       x-list-columns: [name, email, phone]
@@ -114,7 +112,6 @@ components:
 
     Vet:
       type: object
-      x-resource: vets
       x-primary-key: id
       x-display-format: "Dr. {name}"
       x-list-columns: [name, specialty, email, phone]
@@ -158,7 +155,6 @@ components:
 
     Treatment:
       type: object
-      x-resource: treatments
       x-primary-key: id
       x-display-format: "{label}"
       x-list-columns: [label, description]
@@ -189,7 +185,6 @@ components:
 
     Pet:
       type: object
-      x-resource: pets
       x-primary-key: id
       x-display-format: "{name} – #{id}"
       x-list-columns: [name, species, age, weight, birthDate, parents]
@@ -260,7 +255,6 @@ components:
 
     Appointment:
       type: object
-      x-resource: appointments
       x-primary-key: id
       x-display-format: "Appt #{id} – {date}"
       x-list-columns: [date, pet, vet, treatment, notes]
@@ -295,7 +289,7 @@ components:
           $ref: '#/components/schemas/Pet'
           x-fk:
             resource: pets
-          x-order: 3
+          x-order: 4
           x-label: "Pet"
           x-description: "Select a pet"
           x-filterable: true
@@ -304,7 +298,7 @@ components:
           x-fk:
             resource: vets
             prefetch: true
-          x-order: 4
+          x-order: 5
           x-label: "Veterinarian"
           x-description: "Select a veterinarian"
           x-filterable: true
@@ -313,13 +307,13 @@ components:
           x-fk:
             resource: treatments
             prefetch: true
-          x-order: 5
+          x-order: 6
           x-label: "Treatment"
           x-description: "Select a treatment"
           x-filterable: true
         metadata:
           $ref: '#/components/schemas/Metadata'
-          x-order: 4
+          x-order: 7
           x-label: "Metadata"
       required: [id, date, pet, vet, treatment]
 
@@ -384,19 +378,6 @@ 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)
@@ -945,6 +926,23 @@ paths:
           $ref: '#/components/responses/ValidationError'
         '500':
           $ref: '#/components/responses/InternalServerError'
+  /pets/{id}/calls:
+    get:
+      summary: Stream animal sounds via SSE, scoped to a pet's species
+      operationId: stream_calls
+      x-sse: true
+      parameters:
+        - name: id
+          in: path
+          required: true
+          schema: {type: integer}
+      responses:
+        '200':
+          description: SSE stream of random animal sounds
+          content:
+            text/event-stream:
+              schema:
+                $ref: '#/components/schemas/Call'
 
   /appointments:
     get:
diff --git a/openapi_first/templates/vet_app/routes.py b/openapi_first/templates/vet_app/routes.py
index 97610e4..848fee6 100644
--- a/openapi_first/templates/vet_app/routes.py
+++ b/openapi_first/templates/vet_app/routes.py
@@ -43,6 +43,7 @@ from data import (
     create_pet as _create_pet,
     update_pet as _update_pet,
     delete_pet as _delete_pet,
+    get_pet as _get_pet,
     list_appointments as _list_appointments,
     get_appointment as _get_appointment,
     create_appointment as _create_appointment,
@@ -368,9 +369,14 @@ def delete_appointment(id: int, response: Response):
     response.status_code = 204
 
 
-async def stream_calls():
-    """Stream random animal sounds via SSE."""
-    q = await subscribe()
+async def stream_calls(id: int):
+    """Stream animal sounds via SSE, scoped to a pet's species."""
+    try:
+        pet = _get_pet(id)
+    except KeyError:
+        raise HTTPException(status_code=404, detail="Pet not found")
+    species = pet.species
+    q = await subscribe(id, species)
 
     async def event_generator():
         try:
@@ -378,6 +384,6 @@ async def stream_calls():
                 data = await q.get()
                 yield f"data: {data}\n\n"
         finally:
-            unsubscribe(q)
+            unsubscribe(id, q)
 
     return StreamingResponse(event_generator(), media_type="text/event-stream")
diff --git a/openapi_first/templates/vet_app/sse.py b/openapi_first/templates/vet_app/sse.py
index 7cf8ef2..1dcc5fa 100644
--- a/openapi_first/templates/vet_app/sse.py
+++ b/openapi_first/templates/vet_app/sse.py
@@ -1,44 +1,44 @@
-"""
-SSE broadcast for the animal-sounds worker.
-
-Not part of the openapi_first library API surface.
-"""
-
 import asyncio
 import random
 import json
 
-
-_sounds = ["woof", "meow", "coo"]
-_subscribers: list[asyncio.Queue] = []
-_worker_task: asyncio.Task | None = None
+_sounds_by_species = {"dog": ["woof"], "cat": ["meow"], "bird": ["coo"]}
+_subscribers: dict[int, list[asyncio.Queue]] = {}
+_worker_tasks: dict[int, asyncio.Task] = {}
 
 
-async def _sound_worker():
+async def _sound_worker(pet_id: int, species: str):
+    sounds = _sounds_by_species.get(species, ["woof"])
     while True:
-        sound = random.choice(_sounds)
+        sound = random.choice(sounds)
         data = json.dumps({"sound": sound})
-        for q in _subscribers:
+        queues = _subscribers.get(pet_id, [])
+        for q in queues:
             await q.put(data)
         await asyncio.sleep(random.uniform(1, 5))
 
 
-def start_worker():
-    global _worker_task
-    _worker_task = asyncio.create_task(_sound_worker())
+def _ensure_worker(pet_id: int, species: str):
+    if pet_id not in _worker_tasks or _worker_tasks[pet_id].done():
+        _subscribers.setdefault(pet_id, [])
+        _worker_tasks[pet_id] = asyncio.create_task(
+            _sound_worker(pet_id, species)
+        )
 
 
-def stop_worker():
-    if _worker_task is not None:
-        _worker_task.cancel()
-
-
-async def subscribe() -> asyncio.Queue:
+async def subscribe(pet_id: int, species: str) -> asyncio.Queue:
     q: asyncio.Queue = asyncio.Queue()
-    _subscribers.append(q)
+    _subscribers.setdefault(pet_id, []).append(q)
+    _ensure_worker(pet_id, species)
     return q
 
 
-def unsubscribe(q: asyncio.Queue):
-    if q in _subscribers:
-        _subscribers.remove(q)
+def unsubscribe(pet_id: int, q: asyncio.Queue):
+    queues = _subscribers.get(pet_id, [])
+    if q in queues:
+        queues.remove(q)
+    if not queues:
+        task = _worker_tasks.pop(pet_id, None)
+        if task and not task.done():
+            task.cancel()
+        _subscribers.pop(pet_id, None)