Ekuphileni kwansuku zonke, abantu bajwayele ukubizwa ngezinyoni njenge-breiler breed, kodwa akukho into enjalo kwisayensi. Ezesayensi, ama-broilers abizwa ngokuthi iziphambano. Iziphambano noma ama-broilers ziyingxube yezinkukhu ezahlukahlukene eziye zafaka izimfanelo ezinhle futhi zalahla zonke izimfanelo ezimbi. Unyaka ngamunye isidingo sokudla siyakhula njalo ngenxa yokwanda kwenani labantu emhlabeni.
Isigaba I-Irga
I-Irga iyinhlangano yobukhulu obuncane noma obuphakathi (ububanzi buka-0.8-1.8 ububanzi) obumnyama obuhlaza okwesibhakabhaka, ngokuvamile obomvu. I-shrub inesizotha futhi iqinile. Itholakala kokubili ezindaweni zokulima nasendle. Lesi sitshalo siqala ukuthwala ekuseni, isivuno sivame ukuningi. Ngakho-ke, ukutshalwa kwe-shadberry ezindaweni zomhlaba kuwumsebenzi onenzuzo futhi olula.