According to Columella (De Re Rustica 8.2.7), the ideal flock consists of 200 birds, which can be supervised by one person if someone is watching for stray animals. Source: Internet
According to Columella (De Re Rustica 8.4.1), chickens should be fed on barley groats, small chick-peas, millet and wheat bran, if they are cheap. Source: Internet
For farming, native (Roman) chickens are to be preferred, or a cross between native hens and Greek cocks (De Re Rustica 8.2.13). Source: Internet
Delos seems to have been a center of chicken breeding (Columella, De Re Rustica 8.3.4). Source: Internet
He identified Tanagrian, Rhodic, Chalkidic and Median (commonly misidentified as Melian) breeds, which have an impressive appearance, a quarrelsome nature and were used for cockfighting by the Greeks (De Re Rustica 8.3.4). Source: Internet
Eggs that are long and pointed give more male, rounded eggs mainly female hatchlings (De Re Rustica 8.5.11). Source: Internet