 Why did the crew mind that the cave-cat had kittens?
The Blue Behemoth By LEIGH BRACKETT Shannon's Imperial Circus was a jinxed space-carny leased for a mysterious tour of the inner worlds. With Shannon's Imperial Circus, the Greatest Show in Space, plastered so thick with attachments...." It grates on a man's pride to have to sneak in and out of his own property through the sewage lock. The freaks and the green girl from Tethys who could roll herself like a hoop, and Zurt the muscle man from Jupiter, and all the other assorted geeks and kinkers and joeys that make up the usual corny carnie were doing nip-ups in the passageways and drooling over the thought of steer and toppings.
 One had only four legs
 They didn't perform well while they were small.  They were too dangerous to keep onboard  They had no food for more mouths to feed  One had only four legs