The external parasites of sheep (195?)

A film shot at a sheep ranch in Australia; some sheep are affected by flies which damage the skin. Sheep parasitology is described with footage of the flies in action. These parasites damage fleece and maggots; their lifecycle is described. Find out more: wellcomecollection.org/works/...

[@SuperEngineer786]

Medicine name plz?

[@WellcomeFilm]

The film was made to promote products by en.wikipedia.org/wiki/William_Cooper_(chemical_manufacturer) - some of the brands made in the 1950s may still exist under different brand names, although the company no longer exists.