The coypu is not resistant to cold. When winter temperatures drop, they often cause the coypu's appetite to decrease and their activities decrease. At noon, they emerge from the nest. In the cold northern regions, the rodents can be temporarily moved to the in-house dry nursery in winter. The plots are mostly covered with soft hay, and the room temperature should not be lower than ~ 5 °C. Door and window seams are sealed to prevent cold winds from attacking. In order to avoid the cold winter in the pups' period, it is not appropriate to arrange breeding in autumn. If a mother has a baby in the winter, she must do a good job of keeping her warm and cold. 2 to 3 days before the expected date of delivery, the pregnant rat is moved to a farrowing room or a farrowing shed at 4 to 5 °C, and after 10 days of littering, the dam is returned to its original house at a temperature not lower than ~ 5 °C. The winter diet consists of hay, concentrate feed, and protein supplemented feed. Feeds that are easy to freeze are not fed. Implementation of group rearing, increase the density of rats, make the coypu close to warm insulation, enhance cold resistance.
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