https://trade-britanica.trade/....wiki/Adding_a_Cat_Fl
A door with cat flap lets your pet go outside and then come back inside without you needing to open the doors for them. They are available in varying sizes to fit dogs and cats and also have features that can prevent draughts or unwanted critters. It is best to introduce your pet the door prior to installing it. It will be easier for them to get used to its size, shape and motion. Easy to install Cat flaps can be put up everywhere They can be installed in your garage door or laundry room to give your pets access