diff --git a/src/fellchensammlung/migrations/0005_animal_sex.py b/src/fellchensammlung/migrations/0005_animal_sex.py
new file mode 100644
index 0000000..206afbf
--- /dev/null
+++ b/src/fellchensammlung/migrations/0005_animal_sex.py
@@ -0,0 +1,19 @@
+# Generated by Django 5.0.3 on 2024-03-19 04:50
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('fellchensammlung', '0004_image_adoptionnotice_photos_animal_photos'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='animal',
+            name='sex',
+            field=models.CharField(choices=[('M_N', 'male_neutered'), ('M', 'male'), ('F_N', 'female_neutered'), ('F', 'female')], default='female', max_length=20),
+            preserve_default=False,
+        ),
+    ]
diff --git a/src/fellchensammlung/migrations/0006_alter_animal_date_of_birth.py b/src/fellchensammlung/migrations/0006_alter_animal_date_of_birth.py
new file mode 100644
index 0000000..51dd8ca
--- /dev/null
+++ b/src/fellchensammlung/migrations/0006_alter_animal_date_of_birth.py
@@ -0,0 +1,20 @@
+# Generated by Django 5.0.3 on 2024-03-19 04:51
+
+import datetime
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('fellchensammlung', '0005_animal_sex'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='animal',
+            name='date_of_birth',
+            field=models.DateField(default=datetime.datetime(2024, 3, 19, 4, 51, 44, 367516, tzinfo=datetime.timezone.utc), verbose_name='Date of birth'),
+            preserve_default=False,
+        ),
+    ]
diff --git a/src/fellchensammlung/templates/fellchensammlung/detail_animal.html b/src/fellchensammlung/templates/fellchensammlung/detail_animal.html
new file mode 100644
index 0000000..4dd03ba
--- /dev/null
+++ b/src/fellchensammlung/templates/fellchensammlung/detail_animal.html
@@ -0,0 +1,23 @@
+{% extends "fellchensammlung/base_generic.html" %}
+{% load custom_tags %}
+{% load i18n %}
+
+{% block content %}
+    <div class="detail-animal-header">
+        <h1 class="inline">{{ animal.name }}</h1>
+        <div class="species">{{ animal.species }}</div>
+    </div>
+    <div>
+        <table>
+            <tr>
+                <th>Alter</th>
+                <th>Geschlecht</th>
+            </tr>
+            <tr>
+                <td>{{ animal.hr_age }}</td>
+                <td>{{ animal.sex }}</td>
+            </tr>
+        </table>
+    </div>
+    <p>{{ animal.description }}</p>
+{% endblock %}
diff --git a/src/fellchensammlung/tools/misc.py b/src/fellchensammlung/tools/misc.py
new file mode 100644
index 0000000..e898436
--- /dev/null
+++ b/src/fellchensammlung/tools/misc.py
@@ -0,0 +1,24 @@
+import datetime as datetime
+
+
+def pluralize(number, letter="e"):
+    try:
+        size = len(number)
+    except TypeError:
+        size = int(number)
+    return '' if size == 1 else letter
+
+
+def age_as_hr_string(age: datetime.timedelta) -> str:
+    days = age.days
+    weeks = age.days/7
+    months = age.days/30
+    years = age.days/365
+    if years >= 1:
+        return f'{years} Jahr{pluralize(years)} und {months} Monat{pluralize(months)}'
+    elif months >= 3:
+        return f'{months} Monat{pluralize(months)}'
+    elif weeks >= 3:
+        return f'{weeks} Woche{pluralize(weeks, "n")}'
+    else:
+        return f'{days} Tag{pluralize(days)}'