Domesticated mammalian[1] pet which share 80+% of our DNA and bred and naturally self-selected over few ten thousand generations for their obedience and take fair amount of training from birth is not the same as anything else on earth let alone from another planet.
[1] Domesticating of non mammalian animals is already quite hard with limited true successes, some birds probably come the closest.
Domesticated mammalian[1] pet which share 80+% of our DNA and bred and naturally self-selected over few ten thousand generations for their obedience and take fair amount of training from birth is not the same as anything else on earth let alone from another planet.
[1] Domesticating of non mammalian animals is already quite hard with limited true successes, some birds probably come the closest.