Exclusive: Sources say Defra drafted policy on livestock fails to distinguish between ponies and sheep Exclusive: Sources say Defra drafted policy on livestock fails to distinguish between ponies and sheep Natural England and MPs are urging the government to change its livestock rules to stop ponies on Dartmoor from being culled. Semi-wild ponies have roamed Dartmoor for more than 4,000 years and have become uniquely suited to the boggy landscape, providing a charming sight for those who visit