The price of turkey would go up, people will stop buying as much of it, kids in schools would go hungry. Eventually pig farmers will figure out a way to make pork-based-turkey, hire those workers, feed the kids, and overtake the turkey market. The demand for turkey will dry out, the plan will do a few rounds of layoffs and eventually shut down. As the result, people in town will lose jobs, will stop paying rent, will lose homes and move to a better place with more opportunities.

Supply and demand is a wonderfully simple system that regulates itself, and as much as it sounds appealing, us messing with it will only make things worse.