Everyoneknowsthatthelevelofprofitofbreedinglayinghensisdeterminedbytheeggproductionrate.Highproductioncanmakemoney,otherwise,itcannotmakemoney.Usually,someminorproblemscausedthelayingrateoflayinghenstodrop.Aftertreatment,thelayingratewillberestored.However,ifthereisaproblemwiththereproductivesystemofthelayinghen,thelayingratewilldropsharply,resultinginnolaying.frequentoccurrenceof