The store worker said she was standing in line when a man "came right up to the front and knocked everybody out of the way."
And he dislikes the cigarette smoke from store workers on break.
"He's the big man," said a store worker by phone.
Bird hobbyists and pet store workers may also be at risk.
But another change Wal-Mart made public at the meeting left some store workers worried about their status.
By the cash register, store workers chatted casually about the cold.
During the promotion, the store workers wore t-shirts advertising the contest.
It was not known who fired the shot that hit the store worker.
It was unclear at what point the other suspect and the store worker were wounded.
A store worker, 35, then pulled out his own gun and fired, striking the man in the head, according to the authorities.