Can not be fed alone sweet potato vines in autumn and winter is the sweet potato harvest season, this time, there are many rabbit farmer habits alone to feed rabbits with sweet potato vines. In fact, this feeding method is harmful to rabbits. Sweet potato vines lack vitamin E (tocopherol). If they are used alone to feed a rabbit for a long period of time, the formation of male rabbit sperm can be slowed down and the female rabbit's conception rate can be reduced. Therefore, when rabbits are fed with sweetpotato vines, rabbits must be fed together with other forages, and the amount of each feed should preferably be controlled at about 30%. Mo forgot to supplement rabbits with VA. Most of the meat rabbits are mainly concentrated feed. But also to prevent meat rabbits vitamin A deficiency. Because the content of carrots in fattened rabbit diets will be very low, and in the darkroom cages and intensified fattening, the rabbits will gain weight faster, and vitamin A deficiency will often occur. In addition, the autumn pasture is more vulnerable to vitamin A deficiency than rabbits fed spring grass because the autumn grass has begun to lignify, crude fiber has increased, and the content of carotene has decreased significantly. Therefore, in the autumn, rabbits should not forget to add a certain amount of vitamin A to rabbits. When the supply of vitamin A is insufficient, meat rabbits will experience reduced feed intake and slower weight gain. In the breeding process, the main method of prevention can be adopted, that is, vitamin A10-20 micrograms per kilogram of body weight per day can be added, thus, it is extremely beneficial to improve the digestion, absorption and conversion rate of the feed and the growth and development of the meat rabbit. China Agricultural Network Editor