The walls of a permanent piggery may be made of brick or stone with cement and should be of nine inch thickness. The walls should be plastered and coated with fine cement up to a height of 4 to 5ft. The corners and the place where the walls join the floor should be made smooth and round. The walls should be 4 to 5ft. high from the floor. The rest of the wall up to the roof can be open.

This podcast is also available as a blog post here: https://zaszambia.wordpress.com/2021/12/16/pig-farming/