Here is a smart cat flap that lets your kitties come in but keeps mice out. It uses computer vision for prey detection. OnlyCat connects to your WiFi network and sends you notifications with clips of your cats. It gives you control which cats can enter and exit.
This cat flap has an E-ink display built-in. It is made with weather resistant materials. It comes with a 5MP camera with IR night vision. You can find out more about it here.