Manaaincl Layina House Temperatures to Improve Flock Performance and Profitabilitv

A survey of commercial egg laying facilities in 1991 indicated that more than 70% of the laying hens in the U.S. were maintained in controlled environment housing and by the year 2000, this would exceed 82%. The survey also concluded that by the turn of the century, more than 38% of these houses would be cooled with either foggers or evaporative cooling systems. Since this survey was conducted, practically all new housing built in the U.S. has been of the controlled environment type (ref. #l).