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Start by feeding and playing with the cat flap. This will make them familiar with the sound it makes when it opens and closes. It is also helpful to apply your cat's scent to the flap. Then, you can move the flap slightly to give your cat an impression of movement. Try to entice them by grabbing their favorite food or toys. Certain herbs (such the cat germander, valerian, clary sage and clary sage) have a enticing scent that many cats enjoy. Installing lets your pet move around whenever it wants, without having to open a window