These sheep are being put through a swim dip to control external parasites such as sheep keds and lice. The sheep are pushed up the race (behind the men) and forced into the dip. As they make their way along the dip, they are pushed completely under the dipping mixture to kill all the parasites.
Te whakamahi i tēnei tūemi
Museum of New Zealand Te Papa Tongarewa
Reference:
MA_I044020
Permission of the Museum of New Zealand Te Papa Tongarewa must be obtained before any re-use of this image.
Tāpiritia te tākupu hou