Was reading over some of the posts where people were talking about getting a boatload of roos when they wanted pullets when ordering from such places as TSC or halfassesd hatcheries. This started me thinking about something that occurs in the wild with alligators/crocodiles. Temperature-dependent sex determination where the temperature, NOT genetics determines the outcome of the sex. Being that birds are believed to be a distant relative of reptiles, (scalely legs), I wondered if there was anything one could do to put the odds in their favor to hatch out more pullets? Temperature/humidity manipulation during certain stages of the development? There is one species of bird that this does apply to, the Australian Brush Turkey.