Learning how to teach a dog to go through a tunnel begins with a short, sturdy cardboard box opened at both ends and braced on either side so it cannot wobble—building confident, voluntary crossings and rewarding after your dog emerges completely before you add a spoken cue or move on to a longer agility tunnel.
Prepare the open-ended starter box
Dogs Trust begins tunnel training with a large cardboard box opened completely at both ends and supported by dining chairs placed tightly against either side. Choose a box wide and tall enough for your dog to walk through without crouching or brushing their back, and fix any unstable support or slippery flooring before inviting your dog near the entrance.
Invite a voluntary crossing
Lay a straight treat trail along the floor through the open box from entrance to exit. Let your dog investigate and follow the trail at their own pace, going slowly with calm verbal encouragement if they hesitate at the threshold. Mark and deliver an extra reward outside the far opening after your dog emerges completely, repeating until straight pass-throughs are relaxed and consistent.
Keep your main reward ready in your hand or pouch before each repetition. Battersea recommends rewarding promptly the moment the intended action happens; in tunnel training, deliver that reward right outside the exit after the completed crossing so your dog drives all the way through.
| Top-Down Setup & Stage | Box & Chair Bracing Layout | Handler Position & Two-Hand Gesture | Dog Path & Reward Point |
|---|---|---|---|
| 1. Braced box + treat trail | Cardboard box flaps folded open or removed at both ends; dining chairs pressed against the left and right outer walls so the box stays rigid. | Stand beside the box with extra treats ready; never block the exit or reach in to pull the dog. | Dog follows the line of floor treats straight through the clear opening and receives the main reward after stepping out the far end. |
| 2. Faded trail + Dogs Trust two-hand gesture | Same stable chair-braced box with fewer or zero treats left on the floor inside. | Stand near the entrance and present a distinctive two-hand tunnel gesture—holding both hands open and parallel to frame the entrance opening while sweeping slightly toward the tunnel mouth. | Dog enters in response to the two-hand framing gesture, passes straight through, and is rewarded immediately past the exit. |
| 3. Spoken cue + later longer tunnel | Keep using the starter box until the spoken cue works reliably; introduce a longer agility tunnel only as a separate later stage. | Say your chosen tunnel word right before your two-hand entrance gesture. | Dog completes the full crossing on cue and collects the reward outside the exit. |
Reduce guidance and add cues
Once your dog walks through the starter box eagerly, gradually place fewer treats inside the passage. Introduce Dogs Trust's distinctive two-hand gesture—holding both hands parallel to frame and point toward the entrance—to invite the crossing, and then pair your spoken tunnel cue with that visual signal. Dogs Trust places longer fabric or agility tunnels strictly as a later stage after your dog has mastered this open-box starter exercise.
Pause or finish
If learning becomes difficult or your dog backs away from the box opening, Blue Cross advises taking a break and rethinking the setup before a later attempt. Never push your dog from behind or pull them by the collar through the box.
If you want to teach low belly movement on open ground rather than walking through an archway, see our separate crawl lesson.
