This project aims to develop one or more feed concepts based on renewable raw materials for use in the gamalenkweek. This feed concepts should be able to prevent or substantially reduce production losses due to illness and the use of antibiotics in gamalenkweek. There will warden focused on viral infections with the White Spot Syndrome Virus (WSSV) and Acute hepatopancreas Necrosis Disease (AHPND) caused by the bacterium Vibrio Parahaemolyticus