Why the shopping unload invites a bolt
Consider the scene from your dog's side. The car returns smelling of interesting places and food. Doors stand open at both ends of her world, the house door and the car door, with you walking back and forth between them like a shuttle she is desperate to escort. Neighbours she likes are on their drives, and you are distracted, laden, and in no position to grab a collar. A bolt in this setting is rarely naughtiness; it is an unmanaged gap in the routine, repeated weekly until it feels like part of the ceremony. Dogs are superb students of recurring household sequences, which is good news: because the unload happens the same way every time, it can be rebuilt as a trained sequence with her job written into it, rather than an improvisation she fills with her own ideas.
Give her a station and secure the learning stage
Choose where she waits before you train anything: a mat just inside the front door, a bed in the hallway, or a spot on the drive within sight of the car if your layout is enclosed and safe. In the learning stage she is never relying on willpower alone. A lead clipped to a fixed, solid point at the station, or a helper whose only job is holding her, means a lunge rehearses nothing and a calm wait earns everything. Set the car routine in her favour too: she comes out of the car first, on the lead, goes to her station, and the unloading begins only once she is settled there, rather than her spilling out mid-delivery among the bags. If your street is busy or the drive unfenced, the indoor station is the right version of this exercise, full stop.
Rehearse the shuttle in small pieces
Practise when no shopping exists. Walk the route empty-handed: station to car, touch a door handle, return, reward her. Add one light bag, then a rustling carrier, then a bag that smells of the butcher's counter, because scent is a difficulty dial of its own. Build to two trips, then three, paying her at the station between journeys so the mat keeps winning against the street. Introduce the neighbourhood on purpose once the basics hold: a family member chatting by the gate is a far better first audience than the neighbour she adores appearing by surprise. If she breaks during a genuine unload, a helper resets her quietly and the remaining bags wait a moment; rushing the reset teaches her that commotion speeds things up. Once the pattern is reliable with the tether as a silent back-up, test short stretches without it on quiet days before trusting it on a busy Saturday.
Fold it into the weekly shop
Success looks boring: car home, dog to station, bags ferried, dog released to say her hellos under control once everything is inside, ideally with a final reward delivered at the station for the whole performance. That closing release matters, because she learns greetings still happen, just after the work rather than instead of it. Keep the station mat, lead, and treat pot stored together where the shopping lands, so the setup takes seconds even when you are tired and the bags are heavy. Visitors helping with bags need the one-line version: ignore the dog until her release, however hopeful she looks. Note the routine and her current stage in KinsLe's Care Teams so a partner or older child unloading the car follows the same script and can mark the practice complete.