Production & ManagementMeat - Broilers Why measure pin bone spacing? October 9, 2019 1124 FacebookTwitterPinterestWhatsAppLinkedinReddItEmailPrintTumblrTelegramMixVKDiggLINEViber Broiler Breeder Management How-to’s provided by Aviagen Tip #2 Routine measurement of the spacing between the pin (pelvic) bones allows correct determination of female sexual maturity and when lay is about to begin.