The diseases affecting poultry can be either nutritional, metabolic and or infectious. The infectious diseases that caused by infectious agents, can exert damaging and sometimes immediate negative effects on the profitability of commercial operations. A disease can spread rapidly among chickens kept together in a cage or house. In an intensive system, we place a great deal of pressure on the chickens to grow fast and to lay many eggs. This situation can cause disease to spread resulting ina lot of damage and losses. An adequate disease prevention program is essential to a profitable commercial poultry operation. Although a disese prevention program may not show immediate returns on the investment, it will be a profitable in the long term. Here, you will find a wealth of information about diseases of chickens, turkeys, ducks, gease, pigeons and rabbit as well as the different methods of their prevention and control.