Houdini-Proof Fence Extender for Dogs

Safely contain a climbing or jumping dog with our curved fence extender kit. Designed with durable, powder coated steel, our proprietary curved dog arm technology is the top of the line in pet containment!
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Our Houdini-Proof Dog Containment System is a fence extender for dogs designed to stop them from jumping and/or climbing an existing fence that is 4' or taller. The key to this fence extension kit is the unique patented design of our fence extender arms. 

These fence toppers for dogs can increase the overall height of your fence by two additional feet. The curved top creates an arch over the fence that stops the dog’s forward momentum and prevents them from jumping and/or climbing over the fence. 

Works on Nearly Any Fence Type

Types of fence systems

The curved extension arms of our fence extender for dogs can attach to most walls and fence types, including, but not limited to, wood, chain link, wire-backed split rail, decorative aluminum/wrought iron, PVC/vinyl fence, and masonry walls.

Durable, Purpose-Built Components

The Houdini-Proof fence topper for dogs is made of formed 1 ⅜” diameter, 16 gauge galvanized steel tubing. It reaches over the fenced area 20” and can be set to raise the fence height as high as two additional feet. Two thick, steel mounting plates are welded to the base portion of each arm, and the entire arm is finished with a UV stable black powder coating. 

See the "Kit Contents" Tab for information on what is included in each kit size.

Mesh Fencing Options

Included in the fence extension kit is your choice of either our Durable Poly Fencing Material or, as an upgrade, we offer black vinyl-coated galvanized Heavy-Duty Welded Wire instead.

The Durable Poly Mesh fence extender for dogs is a very strong polypropylene plastic with UV inhibitors that will withstand a dog jumping into it repeatedly. However, this component will not hold up to a dog that will grab and rip at the fence with its claws or teeth. The poly mesh is a flexible material with square openings measuring 1.7” x 1.7”. The individual wires have a diameter of about 2.0-2.2mm. The advantage of using a fence topper for dogs with poly fencing is that it is easier to install and less costly than the upgraded, heavy-duty welded wire fencing material.

The Heavy-Duty Welded Wire Mesh Fencing is recommended for dogs that regularly test the fence with claws and/or teeth. This type of fence extender for dogs offers some flexibility, but it is more rigid compared to the poly mesh fence extension kit. It also has square openings that measure 1.7" x 1.7". Additionally, the welded wire is considered more durable overall ⏤ made with black vinyl-coated galvanized steel for added longevity outdoors. The welded wire is heavier in weight and a bit more difficult to install than the poly mesh fence topper for dogs. But it is the right product if you are concerned about your dog repeatedly and persistently testing the fence extension system.

Combine Fencing Solutions

A Freestanding DIY Dog Fence can be used to build a new fence line from the ground up and create a standalone enclosure for your dog. But did you know it can work with your existing fence too? Create a barrier across a walkway, use it as a partition to divide a yard or keep dogs separated, or use part of your existing fence to create an enclosure within the yard. Freestanding fencing solutions can even be used alongside your fence extender for dogs.

Gaps in your fence line? Incomplete perimeter fence? Or maybe a shared fence with your neighbor that you can’t modify? Fill in the gaps with our Freestanding DIY Dog Fence!

Dog going over AND under the fence? Consider adding our Dig Proofer system to your setup!

Do you want to combine our fence toppers for dogs with a dig proofer system? Read more about how you can combine Dog Proofer systems to create a safe outdoor space for your dog.


If you have a very large and powerful dog you consider extremely aggressive, a very large enclosure, or other special circumstances, please contact us by email or call 888-211-0617 to discuss the best fence extension kit for your dog.

Houdini Dog Fence Extension System 50 Foot Kit 100 Foot Kit 150 Foot Kit 200 Foot Kit 250 Foot Kit 300 Foot Kit 350 Foot Kit 400 Foot Kit
Curved Houdini Fence Extensions 6 12 18 24 30 36 42 48
42" Durable Poly Mesh OR Heavy-Duty Welded Wire Mesh 50 Feet 100 Feet 150 Feet 200 Feet 250 Feet 300 Feet 350 Feet 400 Feet
UV Rated Ties (bags of 100) 1 2 3 4 5 6 7 8
Written Installation Instructions Yes Yes Yes Yes Yes Yes Yes Yes

*Fasteners are NOT included in our fence extender for dog kits due to the wide variety of fence types. Refer to the Installation Tab for more information on selecting the right fastener.

Note: arms, fences, zip ties, and other accessories are available separately. Please order according to your needs which may require more or less than the number of components provided in the kits. Contact us if you would like assistance determining what components you will require for your specific application.

The arms secure to wood posts with screws or lags, round metal posts (like for chain links) with U-Bolts, and square metal posts with Square U-Bolts.

Both fence options are secured to the Dog-Proofer arms with our black UV stable 120lb test Heavy Duty Zip Ties.

Installation Instructions

Chain Link Fences:

  • You will need (2) U-Bolts of the appropriate size to secure each Houdini-Proof arm to a round chain link post. We sell U-Bolts in sets of (2), so one set of U-Bolts is what you need to secure one arm when installing your fence extender for dogs. 
  • It is not easy to measure the diameter of round chain link posts due to post caps and top rails blocking access to the top edge of posts. Use a soft tape measure like the measuring tapes used for sewing to measure the circumference of the post. A circumference of about 5 1/4" = 1 5/8" post, a circumference of about 6" = 2" post, and a circumference of about 7 5/16" = 2 1/2" post. Usually, chain link fence toppers for dogs have bigger posts at corners, endpoints, and gates. 
  • The gate tubes are usually a smaller (1 3/8" diameter) tube. Use a 1 5/8" U-Bolt to a gate tube. If you’re installing a fence extension kit to a fence with a single door gate that will open in, you need one arm on both the gate hinge and latch-to posts and an arm on the gate on the latch side. A double door gate opening in would require that both gates have an arm where the gates meet. For outward opening gates, you need one on each gate post and one on each side of the gate. The arms on the gate need to be set higher so that when the gate opens, the arms on the gate can pass over the arms on the posts.

Decorative Aluminum/Steel and Wrought Iron Fences:

When installing your fence extender for dogs, use square U-Bolts to secure the arms to the posts. We sell the most common size of 2" square U-Bolts. Check your post size. You can also use self-drilling/tapping screws or drill and use bolts. You will likely need to use self-drilling/tapping screws or bolts at gates while installing your fence extension kit.

Wood Fences:

  • Where possible, attach the arms of your fence topper for dogs to the posts with outdoor wood screws or lags. At corners, you may need our Corner Adaptor Kit as the corner arm needs to point at a 45-degree angle. 
  • Outward opening gates require an arm on both sides of the gate, and those arms need to be higher than the arms on the gate posts so the arms on the gate can swing over the arms on the posts.
  • Inward opening gates require an arm on the gate posts and an arm on the gate on the latch side. Use fence installation tools to cut the fence between the arm on the latch post and the gate’s latch side, and the gate will open.

Masonry Walls: 

Secure the arms to the wall with masonry fasteners. You’ll need four per arm to install your fence extender for dogs. 

If you have specific questions, call 888-211-0617 Mon-Fri 9AM-5PM ET or email.

Keep Your Pet In With Dog Proofer

If your dog is climbing or jumping over the fence, look no further than Dog Proofer. When our fence is properly installed, we can help you prevent escapes 99%+ of the time. Our fence extension kits have proprietary designs and come with a three-year warranty. Talk to our experts to get the best fence topper for your dog.

Customer Reviews

Based on 109 reviews
Bruce Coorpender
Defeat for our jumper

Our American Bulldog can clear a 6' fence if she hears a cat. With the dog proofer in place, she ran at the fence the first time, stopped, looked up and had a disgusted look on her face.

Jennifer I

I have 3 larger dogs who get very excited when anything passes our yard. I purchased the Houdini-proof dog proofer and couldn't be happier. Now my dogs can play in the yard without worry of jumping the fence to greet the garbage man or people passing. Great product! I would highly recommend it!

Best solution for jumping dogs!

The Houdini Fence literally saved my dog from escaping the yard through fence jumping. I upgraded the fence knowing he would try to bite the fence and that was a smart buy as well. He spent a lot of time trying to jump, bite, and body slam his way through and the fence did it's job spectacularly.
I took videos, it was amazing to see!
I now leave him to come in and out as he wants. I no longer worry about him jumping over the fence, and while he still attempts it once in awhile I know he's safe!

Mike E
great solution to a difficult problem

We have a yard with wood fence and also with chain link. We have a boxer that we rescued that would leap over the fence like it wasnt there. We tried shock collars, invisible fencing, a couple of weird DIY things and nothing was working. Decided to invest in the system from dog proofer and after taking a few hours to set it up our little guy was done escaping. Been over a month and now he doesnt even try. Just enjoys his outdoor space like we hoped.

Carolyn Jones
Dog Proofer does the job.

So far the Dog Proofer has kept the escape artist inside the fence. Can’t ask for more!

Robert Horsley
Awesome stuff

We are actually promoting this style of fence. Great product!

Joshua Scott
So far so good

I had nicknamed my dog “Houdini” because she was easily jumping our fence and wondering the neighborhood. We could not afford a new fence so I found the Houdini fence extension online and decided to order one. Installing the fence was easy. My dog has not yet been able to get out. I feel better knowing she is safe and confined to our backyard area. Shipping was fast and all components seem to be of good quality.