Sorry about the pun in the title. Actually this is a serious matter. Demands from a rapidly increasing human population means that food production techniques have to be maximised for efficiency. Moisture has a proven effect on the size of poultry grown in large numbers. Research on broilers (chickens for eating) and turkeys shows that their living conditions impact directly on their growth and health. Studies in the United States have estimated the cost of lack of moisture control to run into several hundred million dollars each year. But how can something that sounds so simple be such a big problem?