Recreated Species by Humans - Pet Beasts

In the year 2119 AD, humans are the only species on earth. Taking advantage of the "retro trend", humans have recreated new creatures--pet beasts as companion pets. The emergence of new species was once popular and then spawned a series of social and family conflicts. Pet animals were tragically abandoned. As a result, the social structure of the earth has also undergone earth-shaking changes. Is it in compliance with nature or is it a man-made conspiracy?