Best Dog Doors NZ — The Complete 2026 Buyer's Guide
Choosing a dog door in New Zealand comes down to three decisions: where it's going (glass, timber, PVC or metal), how big your dog is, and whether your glass is single or double glazed. This guide walks through all three, then compares every Dogwalk® model side by side: flap sizes, cut-outs, glass and panel ranges, so you can buy once and buy right. Dogwalk® doors are designed in New Zealand by Pet-Tek International, manufactured from UV-stabilised polycarbonate for NZ conditions, and backed by a 3-year warranty with spare parts available for every model.
- Match the flap to the dog: 203×187mm for toy breeds, 240×180mm for small dogs, 216×250mm for spaniel-size, 270×313mm for Labrador-size and most large breeds.
- Glass fitting models install via a single round glazier cut-out (320mm or 385mm); wood fitting models are a DIY job in timber, PVC or metal panels.
- Ranch sliders and modern double glazing are almost always toughened glass, so a replacement panel with the hole pre-cut is the standard route.
Step 1 — Where Is the Door Going?
Glass panel, ranch slider or patio door: choose from the glass fitting Dogwalk® range. A glazier core-drills one round hole: a faster, cheaper and lower-risk job than the rectangular cut-outs imported brands require. The full process is covered in our glass fitting guide (identical for dog doors, just a larger hole).
Timber, PVC or metal door panel: choose from the wood fitting Dogwalk® range, a straightforward DIY installation with a jigsaw, covered in the fitting instructions included with every door.
Double glazing: the dual glaze glass models suit sealed units up to 32mm thick. If the glass is toughened (nearly all ranch sliders), your glazier orders a replacement panel with the hole pre-cut; routine work, explained in our double glazing guide.
Step 2 — What Size Does Your Dog Need?
Measure your dog's shoulder height and widest body width, then add 25mm to each; full method in the measuring guide. As a quick reference by breed size:
- Toy breeds (Chihuahua, Yorkie, small terriers): the 203×187mm maxi flap on the maxi pet door range is usually sufficient.
- Small dogs (Cavalier, Shih Tzu, Miniature Schnauzer): 240×180mm flap: wood fitting small dog doors.
- Small-medium dogs (Cocker Spaniel, Border Collie pup, Beagle): 216×250mm flap: intermediate glass models.
- Medium-large dogs (Labrador, GSD, Golden Retriever, Huntaway): 270×313mm glass flap or 320×270mm wood flap: standard dog doors.
In-between sizes? Go up, not down; a dog squeezing through a tight flap will stop using it. Puppies: buy for the adult size of the breed.
The Dogwalk® Range Compared — Every Model
Glass Fitting Dog Doors
| Model | Best For | Flap | Glass Range | Cut-Out |
|---|---|---|---|---|
| G-DDSLC / G-DDSLW, standard slim line | Large dogs, single glazing | 270×313mm | 4–20mm | 385mm |
| G-DDC / G-DDW / G-DDB, standard dual glaze | Large dogs, double glazing | 270×313mm | 3–32mm | 385mm |
| G-IDDSLC / G-IDDSLW, intermediate slim line | Small-medium dogs, single glazing | 216×250mm | 4–13mm | 320mm |
| G-IDDC / G-IDDW / G-IDDB, intermediate dual glaze | Small-medium dogs, double glazing | 216×250mm | 4–32mm | 320mm |
Wood Fitting Dog Doors
| Model | Best For | Flap | Panel Range | Overall Size |
|---|---|---|---|---|
| W-SDDW / W-SDDB, small slim line | Small dogs, thin panels | 240×180mm | 11–30mm | 325×240mm |
| W-SDDTW / W-SDDTB, small tunnel | Small dogs, thick doors & walls | 240×180mm | 11–52mm | 325×240mm |
| W-DDW / W-DDB, standard | Medium-large dogs | 320×270mm | 5–36mm | 400×355mm |
All models: white (W) or clear/smoke (C) with black (B) options as listed, UV-stabilised polycarbonate construction, 4-way locking, 3-year warranty. Specifications from catwalk-petdoors.com product pages, July 2026.
Most NZ homes (ranch slider + Lab-size dog): G-DDC standard dual glaze; the 3–32mm glass range covers virtually every sealed unit, fitted via replacement panel. Small-medium dog in double glazing: G-IDDC intermediate dual glaze. DIY into a timber back door: W-DDW standard wood fitting. Small dog through a thick wall or solid-core door: W-SDDTW small tunnel; its 52mm range handles what other doors can't.
What Sets Dogwalk® Apart in NZ
- Round cut-out for glass: one core-drill pass, no corner stress points, the format glaziers prefer. Full detail in why glaziers prefer round cut-outs.
- Built for NZ conditions: UV-stabilised polycarbonate that won't yellow or go brittle in New Zealand sun, designed here since 1999.
- No batteries, no electronics: mechanical 4-way locking that works through power cuts and never needs charging.
- Spare parts for life: replacement flaps, rings and locks for every model, including doors fitted 20+ years ago.
- Insulation-friendly: dual glaze models preserve the thermal performance of double glazed homes; see keeping your home warm with a pet door.
Getting It Installed
Glass: any glazier; give them the model, cut-out size (320mm intermediate / 385mm standard), glass type and thickness. Under an hour for cuttable glass; replacement-panel lead time for toughened. Wood: DIY with a jigsaw and drill using the supplied template, or any handyman. New to dog doors? Our dog door training guide gets most dogs through confidently within a week. Two details on the checklist come straight from the tooling room: the flap-to-body gap is machined to next to zero tolerance under a full brush seal, and the draft angles inside the body are set so water drains out of the door rather than pooling in it. Neither shows up on a spec sheet, and both decide how the door performs in year five.
Frequently Asked Questions
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