If you can't compete, then get out of the market.
As her turkey farming relatives are producers and not retailers, I doubt it is a problem of direct price competition between them and Wal Mart. It's more likely a case of Wal Mart not being willing to buy from them for the price they want to get. Instead, Wal Mart is telling them that if they don't want to lower their selling price they will go find a different supplier.
This woman and her family seem to think Wal Mart shouldn't be allowed to shop around for the best price, and instead should be forced to accept whatever price the turkey farm wants to charge.
Well, if her "relatives" own a turkey farm, then she can buy at cost--or get them free!