'They are time capsules.... it's as though the tide of agricultural progress receded, leaving some things on the strand line.'
Soay sheep were domesticated at the dawn of agriculture and saddleback pigs were once leaders in their class. Now they are historical curiosities.
Colin Tudge discovers how these, and a distinguished cast of other domestic animals, were almost lost in the face of commercial pressure, and considers whether such breeds may not still have a role to play. Producer AUSON RICHARDS (R)
