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There are a number of various cat door options to fit in your sliding or glass patio door, depending on your preference and security requirements. Choose between electronic and manual cat flaps that let your pet to enter without letting unwanted animals in. You can easily engage an expert to set up your pet door by making an easy request on Airtasker. Just answer a few simple questions about your project, then sit back and wait for competitive offers. Cost The cost of installing a cat flap in the glass door will depend on the kind of cat door you pick and