https://fakenews.win/wiki/Why_....Install_a_Double_Gla
The freedom to let your cat leave and enter the house as it pleases is an excellent way to keep your pet physically active and mentally engaged. Having a flap can also help reduce toileting accidents by making it easier for your cat to exit the house when it needs to. Take a measurement of the door A cat flap allows your pet to leave and come back whenever they'd like without needing to open the door. This is a great method to keep your pet inside the house when you are away or at home. It also helps prevent unwanted pests