由于季节、年龄、营养、疾病等原因，兔毛会脱落，在原来的地方长出新毛。这个过程称为换羽。我们来看看兔子换毛的类型以及它们的特点是什么。

　　Due to factors such as season, age, nutrition, and disease, rabbit hair may shed and grow new hair in its original location. This process is called molting. Let's take a look at the types of rabbit hair changing and their characteristics.

　　一、年龄性换毛

　　1、 Age-related hair replacement

　　这是蒙阴长毛兔在不同生长发育时期的正常换毛。蒙阴长毛兔在一生中会经历两次与年龄相关的换毛。次蜕皮发生在30100日龄之间，第二次蜕皮发生在130180日龄之间。

　　This is the normal molting of Mongolian long haired rabbits at different stages of growth and development. The Mongolian long haired rabbit will undergo two age-related molts in its lifetime. The first molting occurs between 30 and 100 days of age, and the second molting occurs between 130 and 180 days of age.

　　二、季节性换毛

　　2、 Seasonal molting

　　蒙阴长毛兔进入成年后，每年春季和秋季换毛两次。春季换毛发生在3-4月，秋季换毛发生在9-10月。这种季节性换羽与光照、温度、营养、遗传等因素有关。

　　After reaching adulthood, the Mongolian long haired rabbit changes its fur twice a year in spring and autumn. Spring molting occurs from March to April, while autumn molting occurs from September to October. This seasonal molting is related to factors such as light, temperature, nutrition, and genetics.

　　春季，光照由短日照过渡到长日照，气温由冷暖转为炎热夏季，饲料中的干草逐渐被青饲料取代，因此皮毛生长较快，换羽期较短；

　　In spring, the sunlight transitions from short days to long days, and the temperature changes from cold and warm to hot. In summer, the dry hay in the feed is gradually replaced by green feed, resulting in faster fur growth and shorter molting period;

　　秋季，由于由长日照向短日照过渡，气温由冷热转凉，青饲料逐渐变粗变老，皮肤毛囊的代谢功能减弱，因此被毛生长缓慢，毛色变差。换羽时间延长。

　　In autumn, due to the transition from long day to short day, the temperature changes from hot to cold, and the green feed gradually becomes thicker and older. The metabolic function of the skin hair follicles weakens, resulting in slow hair growth and poorer hair color. The molting time is extended.

　　这种季节性换毛也是兔子对炎热夏季和寒冷季节的本能适应，为自己创造合适的生活条件，并一代一代地传承下去。

　　This seasonal molting is also an instinctive adaptation of rabbits to hot and cold seasons, creating suitable living conditions for themselves and passing them down from generation to generation.

　　三、不定期换毛

　　3、 Irregular hair replacement

　　这种脱毛在兔子身上并不明显。主要取决于毛球的生理状态和营养状况。当个别毛发纤维的生长受阻时就会发生这种情况。这种蜕皮现象不受季节影响，一年四季任何时候都可能发生。一般来说，这种现象在老年兔中比在幼兔中更为明显。

　　This kind of hair removal is not obvious on rabbits. It mainly depends on the physiological and nutritional status of the hairball. This situation occurs when the growth of individual hair fibers is obstructed. This molting phenomenon is not affected by seasons and can occur at any time of the year. Generally speaking, this phenomenon is more pronounced in elderly rabbits than in young rabbits.

　　四、病理性换毛

　　4、 Pathological hair loss

　　当蒙阴长毛兔患有某些疾病，或长期营养不良导致代谢紊乱，或出现皮肤营养不良时，出现全身或部分脱毛。例如，由于某种原因采食量持续减少，或者突然出现非季节性高烧或其他压力，都可能导致脱发。据悉，给幼兔喂食过多的食物，容易导致过早脱毛。

　　When the Mongolian long haired rabbit suffers from certain diseases, long-term malnutrition leading to metabolic disorders, or skin malnutrition, it may experience complete or partial hair loss. For example, a sustained decrease in food intake for some reason, or sudden onset of non seasonal high fever or other stress, can all lead to hair loss. It is reported that feeding too much food to young rabbits can easily lead to premature hair loss.

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