Ucavulu eggs grow very quickly in the fields of farmlands. If you give them more water, they'll grow and hatch even faster. It is nearly impossible to overwater an Ucavulu egg.
Ucavulus are a gentle and friendly cow creature that graze the farmlands and pastures of Ark. Heads of cabbage and lettuce grow on their bodies and they grow rather quickly. Ucavulus themselves (and other Ucavulus) do not eat the Ucavulu cabbage; this food is sutenance that is saved for other creatures—such as small birds, insects, and rabbits—to eat.
Ucavulus are vital to having a flourishing and prosperous farm on Ark!