 What is the most dangerous aspect of the neutroids and other mutant animals?
Conditionally Human By WALTER M. MILLER, JR. They were such cute synthetic creatures, it was impossible not to love them. "A small child is an imbecile. But think—we get this house rent-free; I've got my own district with no bosses around; I make my own hours; you'll meet lots of people that stop in at the pound. If I don't want to follow my aptitudes, the only choice is common labor. "They assigned me to it because I liked babies. And because I have a B.S. in biology and an aptitude for dealing with people. Destroying unclaimed units is the smallest part of it. Honey, before the evolvotron, before Anthropos went into the mutant-animal business, people used to elect dogcatchers. With its population legally fixed at three hundred million, most of the country had become one big suburb, dotted with community centers and lined with narrow belts of industrial development. It was a cat-Q-5. The cat-Q-5 stared at him impassively for a moment, let out a stuttering high-pitched wail, then: "Kiyi Rorry." The cat-Q-5 took its time about answering. A class-C couple, allowed no children of their own, could get quite attached to a cat-Q-5. The felines were emotionally safer than the quasi-human chimp-K series called "neutroids." When a pet neutroid died, a family was broken with grief; but most couples could endure the death of a cat-Q or a dog-F. Class-C couples were allowed two lesser units or one neutroid. Attention All District Inspectors: Subject: Deviant Neutroid. You will immediately begin a systematic and thorough survey of all animals whose serial numbers fall in the Bermuda-K-99 series for birth dates during July 2234. This is in connection with the Delmont Negligency Case. Seize all animals in this category, impound, and run proper sections of normalcy tests. Delmont has confessed to passing only one non-standard unit, but there may be others. He disclaims memory of deviant's serial number. This could be a ruse to bring a stop to investigations when one animal is found. If allowed to reach age-set or adulthood, such a deviant could be dangerous to its owner or to others. Hold all seized K-99s who show the slightest abnormality in the normalcy tests. Its replacement-quota of new neutroids was around three hundred animals a month. He tried to estimate how many of July's influx had been K-99s from Bermuda Factory.
 Their cute appearance makes it easy for humans to get attached to them, and mass levels of attachment could potentially thwart current methods of classifying members of society.
 Because they are grouped together in isolated areas, it is possible that they could use their adorable appearance and innocent demeanor to hide the fact that they are conspiring to overthrow the society.  Because they only live up until a certain age, they often act with a level of invincibility that is threatening to society and its systems of social stratification.  Their cute appearance causes others to underestimate their high predatory instincts and behaviors, and many injuries and deaths result because of this incongruency.  Their cute appearance makes it easy for humans to get attached to them, and mass levels of attachment could potentially thwart current methods of classifying members of society.