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狗怎么看它老不老

更新时间: 2020-08-15 00:00:00     

判断狗的年龄,主要依靠狗牙齿的磨损和脱落情况,同时还参考面部表情、体态、被毛情况。

以及有无老年毛的发生和老年性眼睛的变化等。牙齿的磨损和脱落情况狗生后十几天即生出乳齿,两个月以后开始由门齿、犬齿、臼齿逐渐换为恒齿,8至10个月恒齿换齐,但需要1岁半以后牙齿才能生长坚实。

小狗吞吃了换掉的乳齿也无所谓,因为乳齿较软,狗的胃肠能把它消化掉。

关键词: 怎么

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