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SureFlap Microchip Pet Door Review: Best for Large Cats?
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Editorial note: This evidence-based review uses manufacturer specifications, installation guidance and practical use-case analysis. We have not presented it as hands-on testing. See how we review products.
Verdict: The SureFlap Microchip Pet Door is the strongest non-connected SureFlap option for large cats and small dogs. Its approximately 150 × 170 mm (5.9 × 6.7 in) opening is substantially roomier than the standard cat flap, while microchip recognition helps keep unfamiliar animals out. It is a good fit when size and a programmable curfew matter, but it does not provide app control or individual exit permissions.
| Best for | Large cats and small dogs needing selective entry |
|---|---|
| Identification | Compatible implanted microchip or Sure Petcare RFID collar tag |
| Stored identities | Up to 32 |
| Flap opening | Approximately 150 mm wide × 170 mm high |
| Power | Four C-cell batteries |
| Connected features | None; no Wi-Fi, app or Hub required |
| Our assessment | Best simple SureFlap for cats too large for the standard opening |
Check the SureFlap Microchip Pet Door on Amazon
Measure your pet and the installation area before ordering. Confirm the exact model, included accessories and local availability on Amazon, because listings and international matches can change.
What the SureFlap Microchip Pet Door does
The door reads a compatible implanted microchip or Sure Petcare RFID collar tag as a registered pet approaches from outside. It then releases the lock for that identity. Unregistered animals remain outside, helping prevent neighbourhood cats and some wildlife from entering the home.
It stores up to 32 pet identities and uses simple local controls. There is no account, subscription, internet connection or Hub. A curfew mode can be programmed to lock and unlock the door at specified times, which is useful when every pet follows the same schedule.
The crucial limitation: selective entry, not selective exit
The standard Microchip Pet Door identifies animals entering the home. It does not give different household pets individual permission to leave. In normal use, any animal can exit unless the door is manually locked or the shared curfew is active.
If one cat must remain indoors while another may go out, this is not the right model. Consider the SureFlap DualScan for individual exit permissions, provided your cats fit its smaller opening. For remote locking and activity history, compare the SureFlap Connect.
Who should buy it?
Large or broad cats
The larger opening is the main reason to choose this model over the standard SureFlap cat flap. It may suit broad-bodied, tall or less agile cats that appear cramped by a conventional opening. Actual fit matters more than breed name, so measure the widest and tallest points that must pass comfortably.
Homes visited by unfamiliar animals
An ordinary unlocked pet door can invite neighbourhood cats, wildlife and food thieves indoors. Selective entry allows registered pets to return while blocking unregistered visitors at the flap.
Owners wanting a curfew without an app
The built-in curfew suits households that want the door to lock and unlock on a routine schedule but do not need remote control. Because it operates locally, the core function does not depend on Wi-Fi.
Mixed cat-and-small-dog homes
The opening may suit both a large cat and a small dog, provided each animal is measured and compatible. Multiple identities can be stored, so several pets can share the door under the same access rules.
Who should choose another model?
- Ordinary-sized cats: the smaller standard SureFlap review may lead to a less obtrusive and potentially simpler installation.
- Different exit rules per cat: DualScan is designed for individual entry and exit permissions.
- Remote control or activity history: choose a Connect model and confirm whether the Hub is included.
- Very large pets: do not assume the word “pet door” guarantees fit; measure the opening against the animal.
- Renters: obtain written permission before cutting a door, wall or glazing panel.
- Owners expecting GPS: microchip recognition works at the doorway; it does not track a pet outdoors.
What we like
A genuinely larger passage
The 150 × 170 mm opening addresses a practical gap in the range. Buyers do not have to force a large cat through the smaller standard flap merely to gain microchip-controlled entry.
Simple, local operation
No Hub, cloud account or phone is required. This reduces setup complexity and keeps the main access function independent of an internet service.
Programmable curfew
A shared lock-and-unlock schedule is more convenient than remembering to close the door manually every evening. It is particularly useful when all resident pets follow the same routine.
Multiple registered pets
Support for up to 32 identities is ample for most homes and makes the door practical for multi-pet households.
What could be better
No individual exit permissions
The most important weakness is that registered pets cannot be given different exit rules. Owners sometimes assume that a microchip-controlled door reads both directions and manages each pet separately, but this model primarily restricts entry.
The larger frame needs more space
A bigger opening means a bigger installation footprint. Check the complete product dimensions and proposed cut-out against door panels, mouldings, frames and internal mechanisms before buying.
Four C-cell batteries
The door uses four C batteries rather than the AA batteries used by smaller SureFlap models. Keep replacements available and act on the low-battery warning so a pet is not left relying on an uncertain door.
Installation cost can exceed expectations
Timber may be relatively straightforward, while glass, metal, composite doors and walls can need accessories or professional work. Compare the total installed cost, not only the product price.
Microchip Pet Door vs Cat Flap vs Connect
| Feature | Standard Cat Flap | Microchip Pet Door | Pet Door Connect |
|---|---|---|---|
| Opening | Smaller, for ordinary-sized cats | About 150 × 170 mm | About 150 × 170 mm |
| Selective entry | Yes | Yes | Yes |
| Individual exit permissions | No | No | App-based access controls vary by setup; verify current specification |
| Scheduled curfew | Model-dependent/manual controls | Yes, locally programmed | Yes, including connected control |
| Remote control | No | No | Yes, with compatible Hub and app |
| Activity history | No | No | Yes, with connected setup |
| Best for | Simple selective entry | Large pets without smart features | Large pets plus remote monitoring |
See our complete SureFlap model guide for a wider comparison.
How to measure your pet
- Measure the widest point of the chest or hips while the pet is standing naturally.
- Measure from the underside of the belly or chest to the top of the shoulders.
- Compare both measurements with the clear flap opening, leaving comfortable clearance.
- Observe how the pet steps through an existing opening; older or less mobile animals may need extra room and a lower threshold.
- Check that the intended installation height allows a natural step rather than a jump or crouch.
Do not rely solely on weight limits or breed examples. Two cats of the same weight can have very different body shapes.
Installation considerations
Identify the material before ordering. A suitable timber panel may be a manageable DIY project, but glass should be discussed with a qualified glazier. Existing toughened glass generally cannot simply be cut after manufacture. Wall installations may need tunnel extenders, weather sealing and careful attention to hidden utilities.
Metal can interfere with a microchip reader, so follow Sure Petcare’s installation instructions and use the recommended adapter where required. For composite or security doors, ask the manufacturer or installer before cutting because internal reinforcement and warranties may be affected.
Place the pet door away from internal handles, keys or locks that a person could reach through the opening. A microchip door controls animal access; it is not a substitute for household security.
Training a cat or small dog
- Let the pet investigate the opening without being pushed.
- If the instructions permit, begin with the flap secured open.
- Use treats or a familiar person on the opposite side.
- Introduce flap movement and the unlocking sound gradually.
- Test registration from outside before the pet depends on the door.
- Monitor early use for hesitation, tail trapping or another animal blocking the route.
Nervous pets may take days rather than minutes. A calm, gradual process is more reliable than forcing an animal through.
Security and welfare
Outdoor access can involve traffic, infectious disease, parasites, conflict, toxins and wildlife risks. The right arrangement depends on the individual pet and local environment. Your veterinarian can help assess health-related risks, while secure catios and supervised outdoor time may be safer alternatives in some locations.
A curfew can support a routine, but always confirm that every pet is safely inside before relying on the scheduled lock.
Frequently asked questions
Is it suitable for a Maine Coon?
It may suit many large cats, but breed name is not a guarantee. Compare the individual cat’s body measurements and mobility with the approximately 150 × 170 mm opening.
Does it keep one cat indoors while another goes out?
No. It primarily provides selective entry and a shared curfew. Choose a model with individual exit permissions when household cats need different rules.
Does it need Wi-Fi?
No. This standard Microchip Pet Door works locally and does not require an app or Hub.
Can an unmicrochipped pet use it?
Sure Petcare offers compatible RFID collar tags. Confirm that the correct tag is included or available for the exact listing.
How many pets can it remember?
The manufacturer states that it can store up to 32 identities.
Can it be installed in glass or a wall?
Yes, in suitable installations, but adapters, tunnel extenders and professional work may be required. Follow the current manufacturer instructions for the material.
Final verdict
The SureFlap Microchip Pet Door earns its place when a standard cat flap is too small and the household does not need connected features. Its combination of a larger opening, selective entry and local curfew addresses real problems without adding an app or Hub. The decisive checks are pet fit, installation cost and whether every animal can share the same exit rules.
Check current availability on Amazon
Still comparing? Read our SureFlap buying guide or see whether the Connect model better fits your household.