If something is digging a large, recurring tunnel under your garden shed, you’re dealing with an active burrowing animal, not a one-off collapse. Since it reappears every morning, the key point is simple: you’re filling the symptom, not blocking the source or main entrance.
What it most likely is
In South Asia (including Pakistan), common culprits include:
- Indian crested porcupine – powerful digger, can undermine slabs and foundations
- Indian mole rat – creates deep tunnel systems under structures
- Occasionally badgers or mongooses, but they’re less likely to tunnel under concrete slabs repeatedly
Why it keeps coming back
- The main burrow entrance is not where you see the hole
- You are filling an exit point, not the active tunnel system
- The animal is still inside and simply reopens or reroutes overnight
What I would do (practical plan)
1. Confirm it’s active
- Flatten the hole completely in the evening
- Check early morning
If it reopens → active burrow confirmed
2. Locate the real entry
Look around the shed for:
- Fresh loose soil piles (main entrance nearby)
- Multiple small openings within 5–10 meters
- Slight ground “lifting” near edges of slab
3. Stop the digging (temporary control)
- Fill tunnels with stones + compacted soil, not loose dirt
- Add coarse gravel near slab edges (hard to re-dig through)
- Avoid just shoveling soil in—it’s easily removed again
4. Block re-entry (most important step)
To actually solve it, you need a barrier:
- Bury metal wire mesh (hardware cloth) around the shed perimeter
- Depth: at least 30–60 cm
- Bend it outward in an “L-shape” underground so it stops digging from below
This is the most reliable long-term fix.
5. Deterrents (supportive only)
- Castor oil-based repellents around entry zones
- Strong smells (garlic/pepper mixtures) may discourage return, but won’t stop a determined burrower like a Indian crested porcupine
6. Consider humane removal if needed
- Live traps near active entrances (if legally allowed in your area)
- Professional wildlife control is best if tunnels are large or spreading under the slab
When it becomes serious
You should act quickly if you notice:
- Slab cracking or sinking
- Hollow sound when tapping the ground
- New tunnels appearing daily
That can mean foundation undermining, not just nuisance digging.
Bottom line
This isn’t a surface problem—it’s a burrow system under your structure. The only lasting solution is:
👉 locate entry + install a physical underground barrier + eliminate access routes
If you want, describe the hole size, soil type, or any sounds you hear at night—I can help you identify the exact animal and give a more targeted plan.