Production & Management Be careful when you change to different fans in an incubator January 8, 2021 97 Facebook Twitter Pinterest WhatsApp Linkedin ReddIt Email Print Tumblr Telegram Mix VK Digg LINE Viber Please enjoy a series of Hatchery Tips provided By Aviagen: Tip 25 One fundamental requirement for hatching good quality chicks is providing the correct eggshell temperature(EST) throughout incubation.