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It might seem daunting to set up a cat flap but with the right instructions it's not that hard. Determine how high you would like the cat flap (normally, it is at belly height). Note this on your door, and use the template provided to help you drill. If you have a kitten, or a young kitten hold the door open very slightly and gradually push it to pass through. Reward it as it passes through. Take a measurement of the doo