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Updated 9 October 2026 · Cat Tree UK editorial team
A cat avoiding a flap may be unsure about the moving panel, unable to pass comfortably or worried about what is on the other side. If they used it previously, first check what changed. Repeating training will not fix a jammed lock, pain or another cat waiting outside.
Check the equipment while it is empty
- Confirm the opening suits the cat's current size and mobility.
- Check the panel moves freely and the lock is in the intended mode.
- For electronic flaps, check batteries, registration and the manufacturer's troubleshooting instructions.
- Look for draughts, sharp edges, slipping surfaces and awkward steps.
- Keep both approaches clear of stored objects.
A microchip flap can control which registered animals enter, but does not stop another cat guarding the outside approach. Watch the surrounding area at the times your cat normally uses it.
Make the first step easy
Only practise outdoor passage when outdoor access is already appropriate for the cat. A newly adopted cat should not be encouraged outside merely to test the equipment. Follow settling and veterinary advice first.
If the design permits, secure the flap open safely so the cat can investigate an unobstructed opening. Use a small reward for voluntary approach and passage, keeping normal meals available. Do not push their head through, pull them from the other side or shut off every alternative route.
Cats Protection's flap-training advice recommends gradual introduction and checking whether other cats are making the route feel unsafe.
Introduce the moving panel gradually
Once the open doorway is comfortable, add small amounts of panel movement according to the design. Keep sessions brief. Practise entering as well as leaving; success in one direction does not establish confidence in the other.
If the cat backs away or becomes tense, return to an easier stage. Secure any temporary fixings so they cannot dangle or catch the cat. Restore the intended weather protection and security after supervised practice.
Take sudden refusal seriously
Difficulty stepping or squeezing through can reflect discomfort. Seek veterinary advice for a new reluctance, especially with reduced jumping, limping or changes in toileting. Do not assume an older cat has become stubborn.
Meanwhile provide reliable access to indoor essentials. A cat should not have to overcome a frightening flap to reach food, water, a bed or a litter tray. Keep a note of when they hesitate and what is nearby; that is useful information for both mechanical troubleshooting and behavioural help.