diff --git a/frontend/templates/cat_list.html.j2 b/frontend/templates/cat_list.html.j2
index 3d10f7c..ea6bcc9 100644
--- a/frontend/templates/cat_list.html.j2
+++ b/frontend/templates/cat_list.html.j2
@@ -4,7 +4,7 @@
 	<h1>Cat list ({{ cat_list | length }})</h1>
 	<div class="cat_header cat"
 		hx-get="/hx/cat_list"
-		hx-include="input[name='sortby'], input[name='state_filters']"
+		hx-include="#catlist .cat_header input,  #catlist .cat_header select"
 		hx-target="#catlist_data"
 		hx-trigger="load, reloadCatList from:document, change, htmx:after-request from:(#cat-form form) queue: last"
 	>
@@ -29,10 +29,14 @@
 		<div>
 			Parent A
 			<input type="radio" name="sortby" value="parent_a" />
+			<select name="fltr_parent" hx-get="/hx/get_parent_cat_options" hx-trigger="load, reloadCatList from:document", hhx-swap="innerHTML">
+			</select>
 		</div>
 		<div>
 			Parent B
 			<input type="radio" name="sortby" value="parent_b" />
+			<select name="fltr_parent" hx-get="/hx/get_parent_cat_options" hx-trigger="load, reloadCatList from:document", hhx-swap="innerHTML">
+			</select>
 		</div>
 		<div>
 			Stats
@@ -50,4 +54,4 @@
 		id="catlist_data"
 	>
 	</div>
--</div>
+</div>
diff --git a/mewgenics_heredity/app.py b/mewgenics_heredity/app.py
index e80bd6d..200b389 100644
--- a/mewgenics_heredity/app.py
+++ b/mewgenics_heredity/app.py
@@ -4,6 +4,7 @@ from litestar.plugins.htmx import HTMXPlugin
 from litestar.contrib.jinja import JinjaTemplateEngine
 from litestar.template.config import TemplateConfig
 from litestar.static_files import create_static_files_router
+from advanced_alchemy.extensions.litestar import EngineConfig
 from pathlib import Path
 from .config import config
 from .controllers import CatController, FrontendController, GenerationController
diff --git a/mewgenics_heredity/controllers/FrontendController.py b/mewgenics_heredity/controllers/FrontendController.py
index 8503f94..f5fdbf3 100644
--- a/mewgenics_heredity/controllers/FrontendController.py
+++ b/mewgenics_heredity/controllers/FrontendController.py
@@ -1,9 +1,11 @@
 from uuid import UUID
+import itertools
 from litestar import Controller, get, post
 from litestar.di import Provide
 from litestar.response import Template
 from litestar.plugins.htmx import HTMXRequest, HTMXTemplate
-from advanced_alchemy.filters import OrderBy, LimitOffset, CollectionFilter
+from advanced_alchemy.filters import OrderBy, LimitOffset, CollectionFilter, ComparisonFilter, FilterGroup, LogicalOperatorMap
+from sqlalchemy import or_
 from pprint import pprint
 
 from ..models import Cat, CatRepository, StateEnum, SexEnum
@@ -40,6 +42,7 @@ class FrontendController(Controller):
     async def cat_list(
         self,
         cats_repo: CatRepository,
+        fltr_parent: list[str] | None = None,
         state_filters: list[str] | None = None,
         sortby: str = 'name',
         sortorder: str = 'asc',
@@ -58,6 +61,18 @@ class FrontendController(Controller):
                 )
             )
 
+        if fltr_parent:
+            for parent_id in map(UUID, filter(bool, fltr_parent)):
+                filters.append(
+                    FilterGroup(
+                        or_,
+                        [
+                            ComparisonFilter(Cat.parent_a, 'eq', parent_id),
+                            ComparisonFilter(Cat.parent_b, 'eq', parent_id),
+                        ]
+                    )
+                )
+
         elts = await cats_repo.list(
             *filters,
             OrderBy(sortby, sortorder)
@@ -77,6 +92,33 @@ class FrontendController(Controller):
             }
         )
 
+    @get(path='/hx/get_parent_cat_options')
+    async def get_parent_cat_options(
+        self,
+        cats_repo: CatRepository,
+    ) -> Template:
+        all_cats = await cats_repo.list()
+        parent_ids = set(itertools.chain.from_iterable([ (cat.parent_a, cat.parent_b) for cat in all_cats ]))
+        parent_cats = list(
+            filter(
+                lambda elt: elt.id in parent_ids,
+                all_cats
+            )
+        )
+
+        return HTMXTemplate(
+            template_name='templates/cat_options.html.j2',
+            context={
+                'cat_list': parent_cats
+            },
+            re_target="this",
+            after="receive"
+        )
+
+
+
+
+
     """
     @get(path='/hx/cat_form')
     async def get_hx_cat_form(self,