for v in wormers: # recorre las wormers
            for c in cattles: # recorre los ganados
                if v.option_number_application==0: # veces exactas de aplicar vacuna
                    if ApplicationMedicament.objects.filter(cattle=c, medicament=v).count() > 0: # no es la primera vacuna
                        av = ApplicationMedicament.objects.filter(cattle=c, medicament=v)