Is it worth buying an electronic cat flap to keep neighbours' pets out?

We’re wondering which one should we go for – and if they really work

Is it worth buying an electronic cat flap to keep neighbours' pets out?

Every week a Guardian Money reader submits a question, and it’s up to you to help him or her out – a selection of the best answers will appear in next Saturday’s paper.

A neighbour’s cat keeps coming into our kitchen and eating our cat’s food, so we’re thinking of buying an electronic or microchip cat flap. But which one should we go for? Are they worth the money, and do they always work? What happens when the batteries run out?

Do you have a problem readers could solve? Email your suggestions tomoney@theguardian.com or write to us at Money, The Guardian, Kings Place, 90 York Way, London N1 9GU