Birds that are heat stressed have increased mortality, reduced weight gain and poor feed conversion. As warmer weather approaches, the threat of heat stress increases. Poultry producers need to anticipate this and have housing and management procedures ready to respond. Effective summertime management is crucial for growers to achieve maximum weight gains and optimum feed conversion while preventing bird loss due to heat exhaustion. The following is a summary of some steps to be taken during hot... weather ventilation. The month and year of the full newsletter on each of these topics are listed in parenthesis at the end of each section and can be found at www.poultryventilation.com.