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Allow your cat to go inside and out of your home independently by using the cat flap. This gives your pet the freedom to move around and encourages exercise in order to prevent obesity and relieve boredom. Taskers can fit cat flaps in wooden or uPVC doors Some also work with wall installations. They will start by marking the area of the door before drilling around the corners. How do you install a Cat Flap A cat flap allows your pet to go out without having to open a door or window. This is great if are late at work or worried about leaving your cat home