Suppose there was a breed of, say, monkey, that was popular as a household pet. They were considered to be quite clever and could be trained, over some years, to use a toilet, fetch things from the fridge, even manage primitive forms of communication. The only problem is that they're a genetic trainwreck. They've got a pronounced, gourd-like head with a snout so compact that it's common to have to surgically remove some of their teeth. They've got limited ability in their front legs that forces them to spend their entire life in an abnormal posture, resulting in a cornucopia of spinal and joint problems that cause many of them lifelong pain. On top of all this, all of their natural defenses (claws, canines, protective fur) have been bred out and disease traits bred in (myopia, hemophilia, diabetes, and so on). Now, knowing all of this, suppose your sister, who already has three of these things running around her house, calls up and gleefully announces that they're getting another one. What do you tell her?