The Lani People by Jesse F. Bone

"There are twelve bays to this station," Jordan said. "Under our present setup two are used for breeding and the other ten for maturation. We rotate the youngsters around the bay -- a different bay each year until they're age eleven. Then they're sorted according to type and sent out for a year of further specialized training after which they go onto the farms, or to inhouse or export.

"Now here's the peculiar part. There's no trouble in Bays One through Nine, but Bay Ten has had all our losses except two that have occurred at the training stations."