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Kōrero: Diseases of sheep, cattle and deer

Polioencephalomalacia in sheep

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Polioencephalomalacia in sheep

Polioencephalomalacia is a relatively rare disease, which is caused by thiamine deficiency associated with a diet high in sulfate. It results in the animal ‘star gazing’, as shown in here, or ‘dog sitting’ – becoming blind, circling aimlessly or having a dejected appearance. It is invariably fatal.

Te whakamahi i tēnei tūemi

Private collection

by Gary Clark

This item has been provided for private study purposes (such as school projects, family and local history research) and any published reproduction (print or electronic) may infringe copyright law. It is the responsibility of the user of any material to obtain clearance from the copyright holder.

Ngā whakaahua me ngā rauemi katoa o tēnei kōrero

Me pēnei te tohu i te whārang

Gary Clark, Neville Grace rāua ko Ken Drew, Diseases of sheep, cattle and deer – Reproductive and nervous system diseases, Te Ara – the Encyclopedia of New Zealand, https://teara.govt.nz/mi/photograph/17440/polioencephalomalacia-in-sheep (accessed 4 June 2026).

He kōrero nā Gary Clark, Neville Grace rāua ko Ken Drew, i tāngia i te 1 March 2009.