This volume provides a comprehensive overview of poultry intestinal health and recent advances in alternatives to drug treatment of significant disorders. The chapters start with an insight into immunological processes and the communities of gut microbiota. In the following, a range of antibiotic alternatives in poultry feed and production management is presented, including enzymes, phytobiotics, bacteriophages, the use of probiotics, synbiotics, and many more. Expert contributions on the latest technological and diagnostic developments in the field round off this work to accelerate the study of natural products and next-generation disease therapy. Meeting the demand to combat increased resistance to classic treatment methods, this book forms an indispensable guide for all professionals, veterinarians, nutritionists, students and researchers in the poultry industry, food production, and academia.