 What is the most dangerous aspect of the neutroids and other mutant animals?
They were such cute synthetic creatures, it was impossible not to love them. If I don't want to follow my aptitudes, the only choice is common labor. 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. 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. Seize all animals in this category, impound, and run proper sections of normalcy tests. 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. Its replacement-quota of new neutroids was around three hundred animals a month. And there were only eleven empty neutroid cages in his kennel. "The baby turned out to be a neutroid. Of course, no hospital would play along with her fantasy and take a neutroid, especially since she couldn't pay for its treatment." You're welcome to it, Doctor, but you can't fake a serial number.
 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.