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一、比例失調。理論上1只種公兔可以負擔8~10只母兔的配種任務，但實際上1只種公兔承擔10只母兔的配種任務時，如實行復配，那么這只種公兔就要每天連續配種2次。如此長期頻繁地使用，種公兔會因體質消耗過大而導致性欲減退、精液品質下降，受配母兔空懷率高，失去種用價值。
A, imbalance. Theory 1 kinds of male rabbits can afford 8~10 only female rabbit breeding task, but in fact only 1 kinds of male rabbit bear 10 female rabbit breeding task, such as the implementation of the compound, then the only male rabbit every day 2 times continuous breeding. Such a long-term frequent use, a male rabbit will due to physical consumption is too large and lead to decreased libido, semen quality, with female rabbits by empty rate high, the loss of seed value.

  二、配種過早。長毛兔的性成熟早于體成熟。小體型品系的兔3~4月齡就達到性成熟。而6月齡才接近體成熟；大體型品系的兔4~5月齡達到性成熟，8月齡時才接近體成熟。有些剛引種的養殖場、戶為了在種兔銷售形勢好的時候，早繁殖早出售種兔，不到配種月齡就使種兔提早配種繁殖，結果因種兔營養水平和身體狀況滿足不了自身和胎兒生長發育的需要，造成妊娠母兔大量流產，或產下死胎、弱仔，母兔產后無乳或乳汁不足等情況，這樣不但沒有達到預期目的，反而使種兔身體受到損失，推遲了繁殖期。
Early two, breeding. Angora rabbit early sexual maturity in maturity. Small strains of rabbit 3~4 months reached sexual maturity. And in June was close to the mature age; large strains of rabbit 4~5 months to reach sexual maturity, in August the age was close to maturity. Some just planted farms, for when the rabbit good marketing situation, early breeding Zhongtu early sale, not to breeding months earlier makes rabbit breeding, results due to the need of rabbit nutrition and physical level can not meet the needs of their own and fetal growth and development, resulting in a large number of pregnancy in female rabbits abortion or stillborn birth and weak young, female rabbit postpartum dairy free or insufficient breast milk and so on, so that not only did not achieve the desired objective, but make the rabbit body damage, delayed reproductive period.
  三、連續血配。在母兔產仔后2天內進行交配，使哺乳與妊娠時進行，使母兔在單位時間內生產出更多后代的繁殖方法即為血配。這種方法雖然可以迅速地繁殖后代，但不能連續使用，因為在血配時由于母兔吸收的營養物質一要維持自身的新陳代謝，二要產生乳汁哺育仔兔，三要供給胎兒生長的需要，而通常在一般飼養條件下，母兔吸收的營養物質滿足不了這三個方面的需求，導致母兔體質消耗過大，身體衰竭，乳汁分泌不足；哺乳仔兔由于營養缺乏而體質弱、生長緩慢、死亡率高；所懷的胎兒生長發育緩慢，出生后體弱，成活率也低。
Three, continuous with blood. In the female rabbit litter within 2 days after mating, make lactation and pregnancy, the mother rabbit in a unit of time to produce the most offspring breeding method is with blood. Although this method can quickly to reproduce, but can not be used continuously in the blood, because the timing with nutrients absorption of a female rabbit to maintain their own metabolism, two to produce milk to feed their young rabbit, three to provide for the needs of fetal growth, usually in the common feeding conditions, nutrient absorption of the female rabbit can not meet the needs of these three aspects of the demand, resulting in the female rabbit physical exertion is too large, the body failure, lack of milk secretion; suckling rabbits due to the lack of nutrition and physical weakness, slow growth and high mortality; with fetal growth and development is slow, weak after birth, the survival rate is low.