The Mini Pupper robot dog is not only based on the Raspberry Pi 4B, but its software is also open source which means that tinkerers and modders can easily teach their pet new tricks by reprogramming it.
https://www.notebookcheck.net/Mini-Pupper-This-open-source-robot-dog-based-on-the-Raspberry-Pi-4-is-much-cheaper-than-the-Xiaomi-CyberDog.567742.0.html