feat: further redesign

src/fellchensammlung/models.py

@@ -316,6 +316,13 @@ class AdoptionNotice(models.Model):
             sexes.add(animal.sex)
         return sexes
 
+    @property
+    def num_per_sex(self):
+        num_per_sex = dict()
+        for sex in SexChoices:
+            num_per_sex[sex] = self.animals.filter(sex=sex).count
+        return num_per_sex
+
     @property
     def last_checked_hr(self):
         time_since_last_checked = timezone.now() - self.last_checked