Sheepdogs may be about to be replaced by a superior race

Sheepdogs could find their job taken over by robots after scientists learned the secret of their herding ability.

Rounding up sheep successfully is a deceptively simple process involving just two basic mathematical rules, a study found.

One causes a sheepdog to close any gaps it sees between dispersing sheep. The other results in sheep being driven forward once the gaps are sufficiently closed.