Doug Greer - says he's not sure which one of his chickens layed the  U-shaped egg.

(Some say it kind-of looks like a boomerang)

Anyway, Greer said:

“I’ve been raising chickens off and on all my life, but I’ve never seen an egg like it before."

Greer - incubates and raises chickens.

See it - Link it:

joplin globe article