Custom GPS Fencing for Bullmastiffs

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Living with a Bullmastiff brings its own unique set of challenges, particularly ensuring the safety of your high-spirited and fearless pet without hampering their innate sense of exploration.

The SpotOn Fence is a containment solution that acknowledges your Bullmastiff's specific needs, providing both security and the space your dog needs to explore.

Custom GPS Fencing Tailored to Your Bullmastiff

Bullmastiffs are a true testament to strength and loyalty. Recognized for their impressive size and muscular build, Bullmastiffs are one of the larger breeds, which requires a secure and spacious containment solution. Despite their size, they're not overly active dogs, though they do need space to move around. Their temperament leans more on the mellow side; however, they are also well-known for their protective instincts and might wander off beyond if they sense a potential threat or intruder.

With SpotOn's precision GPS fencing, you can provide your Bullmastiff with the room they need to roam safely. There's no need for physical fences that your large and powerful breed might easily overcome. Whether at home or on the go, SpotOn's solution keeps your Bullmastiff within specified virtual boundaries while giving them the freedom to explore.
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The #1 Rated GPS Dog Fence

Most accurate GPS Boundaries

SpotOn’s patented True Location™ technology taps into a network of 128 satellites to provide boundary accuracy comparable to a buried wire fence.

Sets up in Minutes - Any Size/Shape

Create fences from ½ acre to 1K+ acres at home, on the go, or if you move.

Works where others don’t

SpotOn uses GPS to contain your dog. It works anywhere - even in remote areas with heavy tree cover - without a subscription. Add a cell subscription to unlock additional features.

Enables overlapping fences, fence-within-a-fence

Create multiple overlapping fences on the same property. Add keep-out zones where you don’t want your dog to roam.

Made & supported in our backyard, for your backyard

We proudly design, develop & manufacture in New Hampshire with domestic and foreign parts.

0% Financing & Discounts

Pay in interest-free installments with powered by

Additional financing options available. 0% APR for 12-month terms. Payments as low as as $45.75/month.*

Offers cannot be combined and expire after seven days, unless explicitly stated otherwise.

Military, Veterans & First Responders click here get one year of free tracking (can be combined with site-wide sale).

$999

or financing options from $45.75/month
Size

Collar Size Guide

Selecting the right size is important! It ensures your collar’s antenna will face the sky and receive the strongest GPS signal, making the entire system more accurate.

1. Measure your dog’s neck just above their regular collar.

2. Make sure you can fit two fingers under the measuring tape.

3. Select correct size. SMALL for dogs with 10- 14” necks, MEDIUM for 12-18” necks, LARGE 19-26” necks. If your dog is in between sizes, purchase the smaller size.

  • Free US Shipping
  • 1 Year Warranty
  • 90-day no-hassle returns
  • Ships in 1-3 days

Keep Your Bullmastiff Active With Reliable Containment

Bullmastiffs, although known for their strength and protectiveness, are inherently calm and content with a moderate approach to exercise. However, regular physical activity is essential to ensure the breed stays away from obesity and the undesirable behaviors connected to boredom. Giving your pup some daily free play in your yard will keep your bullmastiff mentally stimulated and physically fit.

With SpotOn Fence's precision GPS fencing, you can create a virtual play zone that gives your bullmastiff the freedom to move about and play, without you worrying about them wandering off or entering restricted areas. The customized fence works in dense tree cover and rough terrain, and can cover huge expanses regardless of the size of your property. And even better, you'll get real-time alerts should your bullmastiff decide to take an unscheduled adventure outside the fence. You get the satisfaction of keeping your dog active and under check without the need of a physical border.

Training Your Mastiff to the SpotOn Fence

Training a Mastiff can pose unique challenges. These massive, intelligent dogs are naturally protective, and their physical strength coupled with a stubborn streak can make implementing conventional boundary training methods an uphill task. SpotOn Fence is here to revolutionize that experience by providing a state-of-the-art, intuitive platform that allows you to establish firm boundaries effectively.

Every SpotOn Fence comes with training modules specially designed to cater to strong-willed breeds like the Bullmastiff. Encountering obstacles on your training journey? We offer a complimentary 1:1 consult with a qualified dog trainer to help you get back on track. This ensures your Bullmastiff comprehends and respects the SpotOn Fence boundaries and has a positive engagement with the training process.

Features

Works in Remote Areas
Great for Large Properties
No Subscription Required
Works Indoors
Quick Charge Battery
Assembled in the USA
Details & Specs

Works In Remote Areas

True Location™ GPS technology is 7x more accurate* than other GPS smart fences - even in the woods and in areas with no internet access.

Cost-Effective for Large Properties

Create and save unlimited fences from ½ acre to over 100,000 acres. Add keep-out zones where you don't want your dog to roam.

No Subscription Required

Optional upgrade gives real-time GPS dog collar tracking notifications if your dog leaves the virtual fence and lets you use the app to call them home.

Can Be Worn Indoors

Only SpotOn lets you set a GPS perimeter around your home to disable feedback and eliminate false warnings or corrections indoors.

Quick Charge Battery

Stay out all day and recharge in about an hour with included power adaptor. Get 25+ hours on a single charge and 10+ hours in extended battery life mode for a total of 35 hours! Learn more.

Designed & Assembled in the USA

We proudly design, develop & manufacture in New Hampshire with domestic and foreign parts.

Details & Specs

SpotOn includes a GPS network connection that allows you to create, save, and use unlimited GPS fences. Also included in the box:

  • 1 SpotOn collar
  • 2 sets of static contact points (for long-haired dogs & for short-haired dogs)
  • Static contact point tester/insertion tool
  • Charging base and wall charger
  • Quick start guide
  • Size Small fits a neck size of 10” - 14”
  • Size Medium fits a neck size of 12” - 18”
  • Size Large fits a neck size of 17" - 26”
  • Battery Type: Rechargeable high capacity lithium-ion battery
  • Battery Life: up to 35 hours of containment
  • Time to fully charge: 1 hour
  • Sim Card: universal - connects to closest towers
  • GPS: High-sensitivity GPS/GLONASS/Galileo/Beidou receiver

SpotOn: The Best GPS Fence for Mastiffs

Learn how the SpotOn Fence can transform your Bullmastiff's outdoor exploration while maintaining their safety.

Experience peace of mind that they're securely contained within the trackable, tailor-made boundaries of the world's most advanced GPS fencing solution.

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SpotOn GPS Dog Fence™
Stephanie S.

With 7 acres of land, it was nearly impossible for us to contain our dogs.

SpotOn GPS Dog Fence™
Leo M.

We live on a 10 acre ranch and she has 9 acres to run around on. I never have to worry about her even though we live along side a major highway.

SpotOn GPS Dog Fence™
Heather H.

I love how I can keep my dogs off the busy road we live on without a fence.