Fab grib x

Almost very good except no unique solution. New forest could swap with dartmoor

Some good ideas, but there's a typo (Cyldesdale for Clydesdale) which is misleading, and because New Forest, Exmoor, and Dartmoor could all be in either the horse breed group or the National Park group, there are at least three equally valid solutions, so the grid doesn't actually work as the walls are supposed to .