In 1958, Demitri Belyaev and Lyudmila Trut started an experiment on domestication. From a large group of foxes, they selected the ones that reacted to humans with more curiosity and less aggression. In each generation, they selected only the friendliest pups to become parents — hoping to recreate the process that originally led to domestication thousands of years ago. The experiment made stunning progress. Even though the foxes were chosen only for their friendliness, they soon started to get many of the physical traits that we associate with domesticated animals — like spots, floppy ears, and curly tails. As communication opened up, the foxes made major contributions to our understanding of how these traits are expressed. The experiment continues to this day.

Players will breed their own domesticated foxes as they pair parents with specific traits, collect trait tokens, and breed new pups to be selected as new parents as they grow up.