Their genetic code was largely based on Terran goats, but with alterations that allowed them to give a creamy milk without the overly strong flavor of the planet's native plant life. This was neccessary because, Sphinx being covered with forests, there was not enough open range land for old-style grazing.
By 1921 PD, the Lin family was in the process of breeding a herd of capri-cows that showed signs of a dangerous affliction. Richard Harrington oversaw the veterinary medical care for the creatures. (SK2)