Doesn't seem a likely animal for good luck symbols, does it. Nevertheless, the Chinese and Irish both craft lucky charms from the images of pigs. Chinese lore indicates a pig brings good luck for businesses. As far as lucky pigs in Ireland, we can look to Celtic legend in which Manannan had a nifty herd of regenerating pigs. The herd never diminished, and there is a legend they even healed themselves too. This might be why an Irish icon of a pig isn't lucky unless it's missing a bit (like an ear or a leg) - perhaps harkening back to Manannan's self-generating pig herd.
(Source:mindreality)
