一、比例失调。理论上1只种公兔可以负担8~10只母兔的配种任务，但实际上1只种公兔承担10只母兔的配种任务时，如实行复配，那么这只种公兔就要每天连续配种2次。如此长期频繁地使用，种公兔会因体质消耗过大而导致性欲减退、精液品质下降，受配母兔空怀率高，失去种用价值。
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、配种过早。长毛兔的性成熟早于体成熟。小体型品系的兔3~4月龄就达到性成熟。而6月龄才接近体成熟；大体型品系的兔4~5月龄达到性成熟，8月龄时才接近体成熟。有些刚引种的养殖场、户为了在种兔销售形势好的时候，早繁殖早出售种兔，不到配种月龄就使种兔提早配种繁殖，结果因种兔营养水平和身体状况满足不了自身和胎儿生长发育的需要，造成妊娠母兔大量流产，或产下死胎、弱仔，母兔产后无乳或乳汁不足等情况，这样不但没有达到预期目的，反而使种兔身体受到损失，推迟了繁殖期。
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、连续血配。在母兔产仔后2天内进行交配，使哺乳与妊娠时进行，使母兔在单位时间内生产出更多后代的繁殖方法即为血配。这种方法虽然可以迅速地繁殖后代，但不能连续使用，因为在血配时由于母兔吸收的营养物质一要维持自身的新陈代谢，二要产生乳汁哺育仔兔，三要供给胎儿生长的需要，而通常在一般饲养条件下，母兔吸收的营养物质满足不了这三个方面的需求，导致母兔体质消耗过大，身体衰竭，乳汁分泌不足；哺乳仔兔由于营养缺乏而体质弱、生长缓慢、死亡率高；所怀的胎儿生长发育缓慢，出生后体弱，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.