Introduce your cat to the flap prior to installation so that they can be familiar with the dimensions and shape. Open the flap and let them explore it from every angle. Make sure the cut-out is level and square. Mark the screw holes and align them with the cat flap https://cat-flap-installer-near-m70640.thezenweb.com/how-much-does-a-cat-flap-cost-68597896