5 Foolproof Ways to Prevent St. Bernards from Digging (That Actually Work)

Your St. Bernard just turned your prize-winning tomato bed into a crater the size of a kiddie pool, and you’re ready to throw in the towel. Here’s the good news: digging in this breed is almost never random destruction — it’s a predictable behavior with predictable fixes, and most owners see real improvement within 2-3 weeks of consistent effort.

If you’re searching for 5 foolproof ways to prevent St. Bernards from digging, you’re dealing with a breed that was originally developed for Alpine rescue work, not landscaping design. Their massive paws (some St. Bernards have front paws wider than a human palm) and 120-180 lb frames can move an astonishing amount of dirt in under 10 minutes. But once you understand the ‘why’ behind the behavior, the ‘how to stop it’ becomes a lot more manageable.

Understanding Why Your St. Bernard Digs

Before throwing money at solutions, you need to identify which of the four main triggers applies to your dog. St. Bernards typically dig for one of these reasons, and the fix changes depending on the cause.

Thermoregulation (The #1 Cause)

St. Bernards have a thick double coat designed for snow, not for 85°F summer afternoons. When a St. Bernard digs a shallow 4-6 inch pit and lies in it, they’re accessing cooler subsoil temperatures — sometimes 15-20 degrees cooler than surface soil in direct sun. This is the single most common cause in this breed, more so than in smaller dogs.

Boredom and Under-Stimulation

An adult St. Bernard needs roughly 30-45 minutes of physical activity daily plus mental engagement. Without it, digging becomes a self-created job. Puppies under 18 months are especially prone to this since their brains are still developing impulse control.

Prey Drive and Scent Investigation

If your dog digs in specific, ever-changing spots rather than one consistent area, they’re likely following the scent trail of moles, voles, or grubs. This is instinct-driven, not behavioral, and requires a different approach than boredom digging.

Anxiety or Escape Attempts

Digging along fence lines specifically (versus random yard spots) often signals separation anxiety or an attempt to reach something on the other side — another animal, a person, or simply open space.

Method 1: Create a Designated Digging Zone

Rather than fighting instinct, redirect it. This is the single most effective method for thermoregulation and boredom-based diggers, with most owners reporting a 70-80% reduction in unwanted digging within two weeks.

• Size: Build a 4×4 foot sandbox (or larger for bigger yards) using untreated lumber, about $40-60 in materials from a home improvement store.
• Fill: Use a mix of playground sand and loose topsoil — roughly 200-300 lbs for a 4×4 box, costing $25-35.
• Location: Place it in a shaded area, since shade + loose soil directly addresses the cooling instinct.
• Seeding: Bury 3-4 toys or a handful of treats in the new zone daily for the first week to build a positive association.
• Redirect: Every time you catch your dog digging elsewhere, calmly walk them to the sandbox and praise/reward digging there instead.

Consistency matters more than perfection here — expect some trial and error for the first 5-7 days as your dog learns the new ‘rules.’

Method 2: Exercise Your St. Bernard’s Body and Mind

A tired St. Bernard is a non-digging St. Bernard. This breed’s massive size fools owners into thinking they’re low-energy, but adults still need structured activity, and puppies (especially 4-12 months) need even more mental engagement.

Physical Exercise Benchmarks

Aim for two 20-minute walks daily rather than one long session — St. Bernards overheat easily due to their coat and brachycephalic-adjacent airway structure, so avoid exercising them in temperatures above 75°F during midday.

Mental Enrichment Tools

• Kong Wobbler ($16-20): Dispenses kibble as it’s pushed around, providing 15-20 minutes of engagement.
• Nina Ottosson Dog Brick puzzle feeder ($20-25): Slows down eating while working problem-solving skills.
• Frozen Kong stuffed with peanut butter and banana (cost: pennies): Takes 20-30 minutes to finish and doubles as a cooling activity in summer.
• Snuffle mats ($15-30): Great for scent-driven diggers since it satisfies the same instinct in an appropriate outlet.

Rotate 2-3 enrichment tools weekly to prevent boredom with the boredom-busters themselves.

Method 3: Block Access and Modify the Environment

Sometimes prevention beats redirection, especially in high-value areas like flower beds or vegetable gardens.

Physical Barriers

• Chicken wire method: Lay galvanized chicken wire flat on the soil surface, just under a thin layer of mulch, around prized plants. Cost: $15-20 for a 25-foot roll. Dogs dislike the sensation on their paws and typically abandon the spot within 2-3 attempts.
• L-footer fencing: For fence-line diggers, bury an L-shaped piece of hardware cloth (buried 12 inches down, extending 12 inches outward from the fence base). Cost: $30-50 for a 20-foot section, but highly effective for escape-motivated digging.
• Rock borders: A single layer of 2-4 inch river rock along garden edges deters casual digging without the labor of burying wire.

Scent Deterrents

Citrus peels, white vinegar sprays, or commercial products like Nature’s Mace Dog Repellent ($19-25 per 40 oz bottle) can be reapplied every 3-5 days or after rain to keep dogs away from specific spots without harming plants.

Method 4: Train the “Leave It” and Redirect Commands

Physical solutions work faster, but training solutions last longer. St. Bernards are intelligent but can be stubborn, so expect training to take 3-4 weeks of daily 5-10 minute sessions rather than a single afternoon.

Step-by-Step Training Protocol

1. Week 1: Teach “leave it” indoors using treats. Present a treat in a closed fist; the moment your dog stops pawing/nosing at it, say “yes” and reward from your other hand.
2. Week 2: Practice the same command outdoors near low-value areas (not the actual digging spot yet).
3. Week 3: Introduce the command in real-time when you catch early digging behavior — sniffing intently and pawing lightly. Say “leave it,” then immediately redirect to the designated digging zone from Method 1.
4. Week 4: Fade out treats gradually, replacing with verbal praise and occasional high-value rewards (small pieces of cooked chicken).

Timing is everything — corrections given more than 2-3 seconds after the behavior are essentially meaningless to a dog and can create confusion or anxiety instead of learning.

Method 5: Address Underlying Anxiety or Medical Issues

If digging is concentrated at fence lines, doors, or appears alongside other symptoms (pacing, drooling beyond normal St. Bernard levels, destructive chewing), you may be dealing with separation anxiety rather than a simple behavioral quirk.

Signs It’s Anxiety-Driven

• Digging only occurs when you’re gone or in another room
• Accompanied by whining, barking, or howling
• Digging directed at doors, windows, or exit points specifically

Solutions

Start with gradual desensitization: leave for 5 minutes, return calmly, then extend absences by 5-10 minute increments over 2 weeks. For moderate cases, a ThunderShirt ($35-45) applies calming pressure. For severe cases, consult your vet about anxiety medication or working with a certified behaviorist ($75-150 per session) — this isn’t overkill for a 150+ lb dog whose anxiety-driven digging can destroy a yard in a single afternoon.

Also rule out medical causes: hookworms, flea infestations, or skin allergies can cause dogs to dig at themselves or the ground seeking relief. A quick vet visit ($50-75 for an exam) can rule this out.

Comparing the 5 Methods at a Glance

Method	Best For	Cost Range	Time to See Results
Designated Digging Zone	Thermoregulation, boredom	$65-95	1-2 weeks
Exercise & Enrichment	Boredom, excess energy	$50-90/month	1-3 weeks
Barriers & Deterrents	Garden protection, fence escape	$15-50 per area	2-3 days
Command Training	Long-term behavior change	$0-150 (classes optional)	3-4 weeks
Anxiety/Medical Treatment	Fence-line digging, distress signs	$35-200+	2-6 weeks

3 Mistakes That Sabotage Your Anti-Digging Efforts

1. Punishing after the fact. Yelling at your dog for a hole dug an hour ago teaches nothing except that you’re unpredictable. Dogs need corrections within a 2-3 second window to connect cause and effect. Fix: Only address digging you catch in real-time; otherwise, simply fill the hole and move on.
2. Filling holes with the dog’s own waste or mothballs. This outdated advice is both ineffective and potentially toxic — mothballs contain naphthalene, which is dangerous if ingested by curious 150 lb dogs. Fix: Use pet-safe deterrent sprays instead.
3. Inconsistent access to the digging zone. If the designated area is fenced off half the time or the sand dries out and hardens, your dog will seek softer soil elsewhere. Fix: Keep the digging zone consistently accessible and lightly water it every 2-3 days in dry climates to maintain diggable texture.

What If Nothing Works? Troubleshooting Stubborn Diggers

Some St. Bernards are persistent enough that standard methods need layering rather than choosing just one.

“I’ve tried everything and my dog still digs”

Combine at least three methods simultaneously rather than testing them one at a time. A dog digging from both boredom AND heat needs both the enrichment toys AND the shaded sandbox — treating only one cause leaves the other unaddressed.

“My dog digs even after a long walk”

This usually signals mental rather than physical under-stimulation. Add 10-15 minutes of training or puzzle-solving after physical exercise; tired muscles don’t equal a tired brain.

“The digging started suddenly in an older dog”

Sudden onset in dogs over 6 years old warrants a vet visit. Cognitive decline, arthritis-related restlessness, or vision/hearing loss can all trigger new digging behaviors that look behavioral but aren’t.

“I rent and can’t build a sandbox”

Use a large plastic kiddie pool ($20-30) filled with sand as a portable, removable alternative that achieves the same redirection effect without permanent yard modification.

Products That Actually Help

• Kong Wobbler – $16-20 – Best for meal-time mental engagement
• Nature’s Mace Dog Repellent – $19-25 – Best for protecting specific garden beds
• ThunderShirt – $35-45 – Best for anxiety-related digging
• Galvanized chicken wire (25 ft roll) – $15-20 – Best budget barrier method
• Nina Ottosson Dog Brick – $20-25 – Best for scent-driven diggers needing an outlet

Final Thoughts: Making the Fix Stick

The real secret to stopping a St. Bernard from digging isn’t any single trick — it’s matching the right method to the actual cause and staying consistent for at least three weeks before judging results. Start by spending one week simply observing when and where the digging happens; that single data point will tell you more than any generic advice ever could. Once you know whether you’re dealing with heat, boredom, instinct, or anxiety, pick two complementary methods from this list, commit to them fully, and resist the urge to switch strategies every few days. Your yard — and your dog’s paws — will thank you.