Step one: search the ground itself, not just the garden
Search at ground level when a Dandie Dinmont Terrier goes missing, because this breed thinks in terms of holes, gaps, and tunnelling rather than open running. Walk your fence line looking for dug soil, a pushed-up board, or a gap beneath a gate that a long, low body on short legs can flatten through. Check under the shed, inside drain covers that sit loose, behind compost heaps, and along any bank where rabbits burrow. Call his name toward openings and then listen in complete quiet for scratching, whining, or the muffled bark of a terrier who has gone in after something and found the return tighter than the entry.
Step two: keep his way home open and scented
Keep his return route welcoming once you know a Dandie Dinmont Terrier is out. Leave the gate or gap he used safely open, place his bedding and your worn clothing beside it, and put strong-smelling food and water just inside where he can reach them without crossing a busy space. A terrier who has been hunting may circle back tired and thirsty hours later, and a closed gate at that moment sends him looking for shelter elsewhere. Station a calm watcher at home, limit comings and goings that bang gates, and resist filling the hole he dug until he is back, since that gap may be the exact route he plans to reuse.
Step three: ask neighbours for a burrow-by-burrow check
Ask neighbours for a ground-level check when a Dandie Dinmont Terrier is missing, because the spaces he uses sit on other people's land as often as yours. Request checks of rabbit warrens, gaps under fences and decking, burrows in paddocks, and any shed with a raised floor. Give helpers a photograph showing his distinctive silhouette, large head with its silky topknot, long body, and short legs, and warn them he may be pepper grey-blue or mustard golden, since people scanning for the wrong colour walk past found dogs.
Step four: make the formal reports with terrier-specific detail
Make formal reports the same day for a missing Dandie Dinmont Terrier, because this is an uncommon breed that finders may describe vaguely as a long hairy terrier. Contact the microchip registry to flag him and verify your phone number, then shelters, rescues, and veterinary practices, spelling out the breed name and describing the topknot, domed skull, and coat colour in plain terms. Share a clear side-on photograph in local groups with the last-seen time and place, and notify breed community groups as well, since Dandie owners notice an unfamiliar Dandie instantly. Ask anyone who finds him to secure him indoors or in a car rather than a garden, because a rested terrier will simply dig out of a strange fence too.
Step five: if he may be trapped, get expert help fast
Get help quickly if you suspect a Dandie Dinmont Terrier is trapped underground or inside a structure, because time, air, and panic all work against a dog in a narrowing earth. If you locate a likely burrow with fresh digging and muffled sounds, keep people and dogs back, talk to him steadily so he stays oriented toward your voice, and call the fire service's non-emergency line, local animal rescue, or experienced terrier workers for guidance before excavating. Do not flood the hole or pull him by a leg. Once recovered, a veterinary check the same day is wise even if he seems bright, since dehydration, eye scratches from soil, and bites from whatever he cornered are easy to miss under that thick coat. While that rescue unfolds, KinsLe through its Lost Pet Alert System keeps nearby members informed, and the neighbour who first hears scratching under a shed can reach you without delay.