Why does my dog respect the fence except when a squirrel runs by?

Prey drive can override learned behavior. Work the run-through ladder in order before adding training: receiver power, approved fit, the tested field and usable safe area, documented settings, and a suitable reviewed plan for controlled distractions; an escape does not prescribe a stimulation increase.

Will raising the correction level hurt my dog?

Static correction is aversive and fitting does not establish safety. Follow the exact receiver instructions and stop for distress, irritation, or repeated escapes. Seek qualified advice rather than continue increasing stimulation.

My dog goes through the fence chasing something and won't come back. What do I do?

Never call them back across an active boundary. The collar can fire as they cross, and some systems correct on re-entry. Power off the transmitter or remove the collar, leash them, lead them back in, and reward the return. Restart at controlled-trigger sessions, and if it keeps happening run the run-through branch of our online fence troubleshooter.

Are some breeds harder to chase-proof?

Chase response varies between dogs and contexts. A breed label does not establish a training duration or prove containment; assess the individual dog's responses and suitability with appropriate help.

What if my dog still runs through at the maximum level?

Repeated escapes, fear or distress are reasons to stop and reassess equipment, training and suitability. Do not wait for a particular escape count or maximum setting. Keep the dog safely contained and consult appropriate qualified help about the plan and alternatives.

How to Stop a Dog Running Through the Fence to Chase

A dog in full chase crosses a narrow correction field in a fraction of a second, and 44% of dogs using electronic containment escaped at least once in their lives in a 2017 JAVMA owner survey. If your dog holds the boundary on quiet afternoons but runs through when a squirrel appears, reassess equipment, the trigger and suitability before deciding what training to attempt. The staged calendar below is an organizational example, not a completion deadline or guarantee. A vendor success percentage is not comparable with this lifetime owner survey unless its methods and population are provided.

Repeated escapes require reassessment, not a guarantee. These two approaches illustrate an escape and a desired retreat; they are not documented training results. In a 2017 JAVMA survey, 66 of 150 electronically contained dogs had escaped at least once. That historical survey does not prove this protocol eliminates escapes. The 3-5 week calendar is an example; reassess equipment, training, and suitability for repeated escapes or fear, and seek qualified help rather than assume stronger stimulation solves it.

Why Standard Training Isn't Enough#

Holding a boundary takes two separate skills:

Knowledge: flags + tone = stop. Boundary training delivers this.
Inhibition under drive: resisting prey, chase, or social drive at full activation. Chase-proofing builds this.

Skipping the second is why dogs who "knew" the fence still end up at the neighbor's house.

Rule Out Hardware Before Adding Training#

Check equipment operation and fit before assuming an escape is a training problem (see the run-through troubleshooting guide for the full diagnostic):

Receiver power. Follow the model's charging or battery instructions and low-power indicators, then complete its off-dog tests. A yard that looks unchanged does not establish operation. See collar troubleshooting.
Poor skin contact. Follow the actual receiver's placement, strap and contact instructions; stop for irritation or distress. Part or trim hair only where the instructions permit, and use approved compatible contacts where needed. A coat change does not by itself diagnose a fault or justify increasing stimulation. Following the actual receiver's wear and repositioning instructions and inspecting skin also helps reduce contact-related risk.
Boundary width too narrow. Use the actual transmitter's field guidance and off-dog test procedure. The 12-24 ft total width discussed in our guides is an equipment example where supported. Make only documented changes, retest the complete route and usable safe area, then reposition flags and review training as instructed. The width setting and testing guide covers calibration.
Correction below arousal level. Check the manufacturer's documented settings and reassess suitability before changing stimulation.
Incomplete training. Fixed by the plan itself.

Repeated escapes do not identify low stimulation as the cause or prescribe an increase. Reassess equipment, the tested route, training and suitability with appropriate help, and maintain suitable physical control. Fear, distress or repeated escapes warrant pausing receiver use while the plan is reviewed.

Before Session One#

Before-Session-One Checklist

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Comfortable boundary responses, documented equipment operation and suitability reviewed; a week of sessions does not establish readiness

A 30-50 ft long line (our store) (never chase-proof off leash)

Contact fit verified using the actual receiver's instructions; spare contact points (our store) on hand, only approved compatible tips used where the instructions call for them

Receiver power checked against its charging or battery instructions and complete field/output tests performed off the dog

Complete route and usable safe area tested using the actual equipment instructions; field settings and flags reviewed

Helper recruited and trigger props matched to your dog's trigger

The Plan#

Click steps to mark them complete

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Confirm Baseline Boundary Training Is Solid

Before day 1

Review the boundary-training readiness checks, documented equipment operation and suitability before introducing distractions. Maintain suitable leash control and seek qualified help for continued boundary testing or escapes; elapsed days do not establish readiness.

Identify the Trigger

Days 1-3

Watch your dog at the boundary and note exactly what breaks them:

Prey: squirrels, rabbits, deer, cats
Movement: cars, joggers, kids on bikes
Social: other dogs, people walking by, the mail carrier

The training sequence is the same for every trigger. Only the staged trigger changes.

Stage Controlled Triggers

Days 4-10

With your dog inside the boundary on the long line, have a helper present the trigger outside the fence at low intensity: a ball rolled slowly, a walking jogger, a leashed dog at distance. Reward every hold.

Use short, comfortable sessions and reward retreat. Increase distraction difficulty only within a suitable reviewed plan after consistent calm responses; three sessions does not prove readiness. PetSafe's containment-training instructions are one model-family example; follow the actual equipment instructions and assessed suitability.

Review Settings and Suitability

During days 4-14

Follow the exact manufacturer's instructions and a reviewed training plan. This page does not establish a universal stimulation increase for high-drive dogs:

Confirm fit, power, and the tested field before considering any settings change.
Use only the equipment's documented settings and seek qualified help for repeated failed sessions.
Stop for fear, panic, irritation, or repeated escapes and reassess the containment plan.
Keep rewarding retreat and assess readiness by behavior rather than a preset escalation schedule.

Before you turn the dial, read what the correction actually feels like.

Real-World Exposure

Days 11-14

Once staged triggers are ignored reliably, supervise your dog through real exposures (wild squirrels, passing cars, dogs on the sidewalk) while they drag the long line. Stay close and reward every hold.

Off-Line With Backup

Weeks 3-5

Review comfortable responses, the tested boundary and surrounding hazards before reducing assistance. Continue suitable leash control or supervision whenever needed. Two weeks of clean sessions, or any other fixed count, does not establish that unsupervised access is appropriate.

If They Break Through#

Do this instead:

Power off the transmitter or remove the collar.
Walk out, leash your dog, and lead them back inside the boundary.
Reward the return. Never punish it, no matter how long the chase lasted.
Restart the plan at Step 3 (controlled triggers) before any unsupervised yard time.

Confirm your actual receiver's return behavior and its removal or deactivation procedure before recovering a dog across the boundary. Do not assume a run-through feature provides a static-free return. If escapes recur, reassess equipment, the route, supervision and suitability using the run-through branch of the fence troubleshooter.

When to Stop#

Two limits of chase-proofing itself:

Sighthounds and other high-prey dogs fail often enough that sighthound rescues categorically reject electronic fences. If that is your dog, read whether an underground fence is right for your dog before investing more sessions.
The fence keeps nothing out. Loose dogs, cats, and wildlife can walk into your yard and become the trigger, and chase-proofing cannot fully solve a provocation that comes to your dog. Supervision remains part of the system.

Breed Notes#

Use the individual dog's comfortable responses and assessed suitability to decide whether and how to progress; breed labels do not set a training deadline.

Sighthounds (Greyhounds, Whippets, Salukis): assume permanent supervision near the boundary. Even excellent training may not override sight-prey response.
Terriers: assess the actual chase response; do not prescribe stronger stimulation from a breed label.
Herding breeds (Border Collies, Heelers): movement-triggered. Stage with bikes, joggers, and cars.
Hunting breeds (Labs, Goldens, Pointers): biddable but scent-locked. Stage with scent trails.

Need More Help?#

Check the FAQ for common questions, or send us a message.

Chase-Proofing: Stop Boundary Run-Throughs Caused by Squirrels, Cars, and Other Dogs

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