Poultry News Chick Weight Loss Post Pull – What is Normal? By Jim - March 12, 2021 487 FacebookTwitterPinterestWhatsAppLinkedinReddItEmailPrintTumblrTelegramMixVKDiggLINEViber Please enjoy a series of Hatchery Tips provided By Aviagen: Tip 29 Chicks have a natural powerful robust provision when they hatch, the yolk sac, which keeps them well supplied with food and water for a number of days until they start consuming feed and drinking water for themselves.