GDC Classic: Multiple character interaction in Petz games

https://gamedeveloper.com/design/gdc-classic-multiple-character-interaction-in-i-petz-i-games

Petz touch, hold, fight, hug, and mate with each other; help and support produce friends, buddies play, share food and toys, and are sad to part; enemies growl, fight, and steal toys and are glad when the user disciplines the other; adults comfort and carry scared young Petz; owners modify behavior through positive and negative reinforcement; states the original Dogz was released in 1995.

Petz (Dogz and Catz)