Ko ngā peera pōro pana kotahi-aronga he mea tito mai i ngā horoi peera e rua (he horoi pou me te horoi whare) me te whare kotahi kei roto ngā pōro. Ka taea e rātou te pupuri i ngā kawenga tuaka i te taha kotahi. Kei roto i te whare ngā pōro, ko te horoi nohoanga whakarārangi kua whakahāngaihia te arataki i a rātou.
