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傳統的(de)牲畜(chu)(chu)養(yang)(yang)(yang)殖主(zhu)要是農戶散養(yang)(yang)(yang)為(wei)主(zhu)，隨著工(gong)(gong)業(ye)的(de)進(jin)展(zhan)和食(shi)品安(an)全(quan)的(de)需(xu)要，現(xian)(xian)代的(de)牲畜(chu)(chu)養(yang)(yang)(yang)殖逐漸(jian)在走(zou)上現(xian)(xian)代化(hua)(hua)、規模化(hua)(hua)、自動化(hua)(hua)、可追溯的(de)道路。以生豬養(yang)(yang)(yang)豬為(wei)例：現(xian)(xian)代養(yang)(yang)(yang)豬生產的(de)工(gong)(gong)藝(yi)流程，采用(yong)分段飼(si)養(yang)(yang)(yang)、全(quan)進(jin)全(quan)出(chu)飼(si)養(yang)(yang)(yang)工(gong)(gong)藝(yi)。六段飼(si)養(yang)(yang)(yang)工(gong)(gong)藝(yi)流程：空(kong)懷期(qi)(qi)(qi)、配種期(qi)(qi)(qi)、妊(ren)娠期(qi)(qi)(qi)、哺乳期(qi)(qi)(qi)、仔…