code: def get_context_data(self, **kwargs):
          
          
          context = super(StrainList, self).get_context_data(**kwargs)
          context['strain_list_alive'] = Strain.objects.filter(animal__Alive=True).annotate(alive=Count('animal'))
          context['cages'] = Animal.objects.filter(Alive=True).values("Cage")        
          return context
docs: This add in the context of strain_list_alive (which filters for all alive animals) and cages which filters for the number of current cages.