It was for this reason that farmers needed a robust, hardy dog capable of working and protecting flocks in harsher environments against predators.
Patterdales have a quite unique ability which is to compress their chests and this enables them to get down small burrows and holes.
They are also capable of lying completely flat on their bellies with their back legs outstretched and their front ones stretched forwards which helps them reach prey that’s gone to the ground.