Multicoloured sheep: life imitates art.

nec varios discet mentiri lana colores,
ipse sed in pratis aries iam suave rubenti
murice, iam croceo mutabit vellera luto;
sponte sua sandyx pascentis vestiet agnos.
(Vergil Eclogues IV.42-45)

Wool shall no longer learn to counterfeit varied hues, but of himself the ram in the meadows shall change his fleece, now to sweetly blushing purple, now to a saffron yellow; of its own will shall scarlet clothe the grazing lambs.