TRIBBLES
Tribbles are small furry fuzzballs about 6 inches in diameter. They are warm-blooded
bisexual mammals capable of reproducing at an incredible rate. In fact, they are
born pregnant. They will not have the energy to reproduce without food, however.
A serum to negate their reproductive abilities was discovered by Dr. Leonard McCoy,
and now they are quite common pets throughout the Federation. Tribbles enjoy humanoid
company, and will purr if content. For some unknown reason, Tribbles do not like
Klingons, and will shriek loudly if even exposed to one. Tribbles will return
the affection shown them by humanoids by somehow empathically projecting feelings
of peace and relaxation.
Note that without a dose
of the "anti-pregnancy" serum, they will breed normally - with all
the obvious results. They live about as long as the average well-kept Terran
guinea pig.