Underground Dog Fence Trencher and Wire Machine

Need to install an underground dog fence fast? Wondering if an underground dog fence trencher could help and where you can find this best? In this article we’ll cover how to bury an underground electric dog fence wire manually or by using a power trencher.

Note: If you click some of the links in this article we may earn a small commission at no additional cost to you.

The Top 5 Underground Electric Dog Fence Trenchers and Wire Machines for Invisible Dog Containment Systems

Best Overall

This is a great, quiet electric model that comes at a very reasonable price. It’s just a bit more expensive than the manual shovel based trencher shown below.

The main downside is the power cord. If you have a very large yard you’ll want to make sure to have enough extension cords or buy or rent the gas-powered trencher shown below.

BLACK+DECKER Edger & Trencher, 2-in-1, 12-Amp (LE750)
  • Boasts a 12-Amp high-torque motor that can tackle tough overgrowth and create clean-looking trench
  • Pull-up edge guide converts from edger to landscape trencher
  • Uses-In Yard Trenching (Around garden beds, trees, borders), Outdoor Lighting/Invisible Dog Fencing Installation and Edging along hard surfaces (driveways, sidewalks, patios, etc)
  • Tool-free assembly is quick and hassle-free
  • Included Components: (1) LE750 Lawn Edger

Runner Up – Best for Budget

Another excellent all electric model. We like these as they are great for ongoing yard maintenance along sidewalk and walkway edges. In reality you’ll only use the trencher for the underground dog fence wire once. If you buy a trencher, best to have something you can use over and over again for other more common yard chores.

WORX WG896 12 Amp 7.5" Electric Lawn Edger & Trencher, Orange and Black
  • POWER LIKE THE PROS: The 12 Amp motor spins the 7.5” blade fast and deep at 4700 revolutions per minute, giving you professional-looking lines and edges
  • 3 DEPTH ADJUSTMENTS: Cut down at 1”, 1-1/4”, 1-1/2” depending on the task at hand
  • CUTTING LINE INDICATOR: Stay on the straight and narrow with the cutting line guide—you’ll notice a difference when you’re done
  • ADJUSTABLE SHAFT: Users of any height can find a length and comfortable position that works for them with the adjustable shaft and D-grip handle
  • DO IT YOURSELF. DO IT BETTER. DO IT WITH WORX: WORX tools are engineered with cutting-edge technology, and above modern efficiency standards, so you can build a cost-effective tool collection that’s been designed to last

Best Heavy Duty Gas Powered Trencher

This is the bad boy you want if you have a huge yard and don’t want to lug around a bunch of extension cords.

It’s expensive so only buy it if you plan on using it for other uses in the garden and yard.

You can also rent trenchers like this for usually less than $100.

McLane 101-5.5GT-7Gas Powered Lawn Edger, 5.50 Gross Torque/3.5 HP B&S Engine 7" Wheels
  • EDGER AND TRIMMER - Make your yard or outdoor space look incredible with this lawn edger machine. McLane bladed edgers and trimmers use single lever blade clutch and depth control for the exact cut you want.
  • PRECISE - This motorized trimmer is designed to ride on most curbs while still delivering a clean cut every time. The cutter head is precision machined uses sealed precision ball bearings on a 2” x 9” spring steel blade.
  • ANY ANGLE - McLane edgers and trimmers cut vertically or horizontally, and do it smoothly thanks to wide rubber tires with ball bearing wheels. The blade can be quickly and easily tilted to almost any angle, and will trim flat at any height.
  • MEET SAFETY STANDARDS - All McLane edger and trimmers meet all established safety standards.
  • MADE IN THE USA - This cordless gas powered lawn edger is proudly made in the USA.

Best Manual Trencher

For those that want to save money with a tool that requires little to no maintenance and lasts a lifetime.

Kenyon 49045 All-Steel Landscape Lighting Trencher/Edger, 45" Steel"T" Handle
  • Landscape trencher with t handle
  • Made of steel
  • Item Product Dimension: 45.5" L x 13.5" W x 1.5" H
  • Item Package Weight: 12.0 lb

Best Multi-Trencher for Dog Fence Wire, Cutting Roots, and Multi-Purpose Use

If you want a trencher that goes beyond just installing the underground dog fence you may want to check out this model. Need to remove a tree root? Need to chop up some tough soil deep in the garden? Then this is the multi-tool for you.

Do you have a long line of underground wire to install? We recommend the gas powered model above and to stay away from this one. Not fun on the back to use this for too long!

GeoRipper minitrencher GR616
  • Mini power trencher used for trenching irrigation, dog fencing, low-voltage landscape lighting, root barrier, strip drain, shallow direct-bury electric cable, fiber optic and coax installations


What Is An Electric Underground Dog Fence And How Does It Work?

An underground electric dog fence uses a transmitter connected to a buried underground wire that runs along the boundary wire of your property. The transmitter causes the dog fence wire to emit a small radio signal.

That radio signal is picked up by a receiver collar worn by your dog. When the receiver collar comes within a few feet of the boundary wire it emits a beep or sound function. If your dog gets closer it then vibrates or causes a small electric shock telling your dog to back away from the fence.

These fences are usually cheaper and easier to install an underground fence than above ground fences. However, they require special training that can take a few days to two weeks.

How To Install An Underground Dog Fence?

We have a more in-depth article on burying an underground dog fence wire and installing an invisible fence system using this technology.

In short you’ll need to do the following:

  1. Charge the receiver collar battery
  2. Plug in the transmitter
  3. Run the boundary wire above ground. See our article on underground fence layout options and our other article on the double loop layout.
  4. Plug the dog fence wire into the transmitter. Remember to use the twisted dog fence wire method discussed in the two articles above when connecting the boundary wire back to your house where the transmitter is plugged in. Twisting the dog fence wire cancels the signal and allows your dog to cross that area of the yard while still staying in the overall property boundary.
  5. Turn on the charged receiver collar and set it to vibrate.
  6. Walk the boundary and confirm the boundary has no weak spots and that the receiver collar is working.
  7. Once everything looks good follow our instructions to bury the dog fence wire. You can leave it above ground or you can bury it from 1 down to 6 inches. Shallow is fine but deeper will protect it better from lawn mowers, cars, and other above ground traffic and disturbances.
  8. Note that if you need to splice dog fence wire together to make it longer be sure to use waterproof splicing hardware that’s proven to last for years underground. See that section on splicing next in the FAQ and remember to use thick gauge wire (14 gauge wire) so it lasts longer!

How to Properly Splice Dog Fence Wire for Underground Dog Fences

In general we recommend purchasing better splicing equipment than the stuff that comes in the kits recommended above. Why? It’ll last longer underground and is less likely to break due to shifting ground, cars driving over it, etc.

Check your dog fence wire to see if it’s stranded (made of lots of small copper strands wound together) or if it’s one solid piece of copper dog fence wire. Most underground dog fence wire will be solid not stranded. Also check what gauge wire you are using and by additional lengths that match the original gauge. We recommend 14 gauge wire if you can as it lasts longer.

Waterproof Invisible Fence Repair Splice Kit, Pack of 4.
Waterproof Splicing Kit for Underground Fence Wires

How Do You Install Your Wire Above Ground?

You can install an underground dog fence above ground. Simply staple it to the bottom of an existing wood fence, zip tie it to a metal fence, or use wooden stakes along your property boundary and staple the boundary wire to the stakes.

While the stake method isn’t the best looking option, it will be a great warning for neighbors who use shock collars that your fence could trigger their dog’s collars.

Plus installing your fence temporarily above ground (without staples) is something we always recommend. You should always test the hardware and look for weak spots before burying the wire.

How Much Time Should You Budget For Installation Using A Wire Trencher?

According to Extreme Dog Fence, one of the premier brands of underground dog fences, it takes about 4 hours to use a powered trencher to install 1,000 linear feet of underground dog fence. That’s about 250 linear feet per hour.