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Cat flaps offer a way to let your cat inside and out without you having to open the door. You can program them to let your cat out only at specific times. This is helpful if you don't want your pet to get stressed. A cat flap can make your home more secure and efficient in energy use. However, it can be costly if don't know what to look for. Cost of the flap Installing an animal flap is a great idea for those who have an animal friend. This will let you allow your pet to go outside whenever it wishes and then return to the house