Adopting scientific breeding can increase the bitten rate of the female bitch. Each litter can produce 8-12 calves, and up to 15 can be produced. The technical points are as follows: First, the appropriate breeding period. Proper mating is the key to effectively increase the fertility rate and calving number of the bitches, and the mating rate of the bitches will be reduced if the mating is too early or too late. In general, the best breeding period is within the 10th to the 13th day from the day when the first blood drops from the bitch's vagina. However, due to the different individual dogs, there are cases of advance or delay. Accurately determine the best breeding time for the female dog, based on the following external behavioral characteristics: First, the vulva continues to swell and soften, the mucus becomes lighter, the blood drops or stops, and secondly, the female bitch is pressed by hand. Waist or touch the tail, the bitch stands still, the tail lifts to one side; third, the bitch initiative to approach the dogs, when the dogs climb, the bitch initiative to squat waist, buttocks against the dogs, the tail To one side, the vulva often open and close, allowing mating. Second, the matching principle. If male and female dogs with common advantages are selected for mating, male and female dogs with the same disadvantages cannot be mated, otherwise the disadvantages of both parties will be further consolidated. In terms of age selection, the most ideal is to have a good age and strong age, and you can also use old age with a good age, and try to reduce old age and old age. Prohibition of mating by inbreeding is not conducive to optimization of species, and it can easily cause congenital malformations and other physiological diseases. Third, breeding methods 1, natural mating: refers to the male and female dogs to mate, responsible by the person responsible for mating records. The best choice for mating is in the place where the bitch is kept, because the male and female dogs are stimulating to other bitches during mating and can promote estrus. Bitches often urinate when a stud dog is present. When a stud dog poses, the bitch also makes the same move, which means that the bitch is willing to accept mating. The estrus bitch stands and the dogs quickly climb and begin mating. During the mating period, the male and female dogs must not be forcibly pulled open due to the physiological characteristics of the dog. The owner should wait patiently. After 10-30 minutes, the male and female dogs are automatically separated. 2. Artificially assisted mating: As male and female bitches lack mating experience, or if male and female bitches differ greatly in size and cannot mate on their own, manual mating can be performed. Such as assisting a male dog to insert the penis into the bitch's vagina, or to raise the bitch, or hold the bitch's arm, or grasp the bitch's collar so that it maintains a stable standing position, so that the male and female dogs complete the mating. After the male and female dogs are mated, it is necessary to check whether they are truly mated. If the vulva is in a naturally closed state, it is a false fit, indicating that the penis is not inserted or ejaculated. In case of this kind of situation, it should be supplemented in time. Four, breeding methods 1, single match: In the bitch during a estrus period, only with the male dog once. Its advantage is that it relieves the breeding burden of male dogs. If it can be bred in time, the ideal fertility rate can also be obtained, but the conception rate is generally not too high. 2. Repeated breeding: During one estrus period, the female dog is assigned twice to the same male dog. The first breeding interval is about 24-48 hours, and the second female dog is allocated once more. This can make the female dog's reproductive tract always have strong vitality. Spermatozoa increase the chance of sperm and egg binding, thereby increasing bittern fertility. Practice shows that: the fertility rate is only 58% for mating only once, 72% for mating twice and 83% for three times. The use of repeated breeding methods can increase the number of calving without disturbing the blood relationship. Generally, the field home uses this method. 3. Double mating: In one estrus period of the female dog, two dogs are used to mate with one bitch at intervals of 24-48 hours. With two male dogs mated 2 times, when mated with the second male dog, can cause the female dog to supplement the reflective excitement, prompt the egg to accelerate maturation, shorten the ovulation time, increase the number of ovulation, so that bitches more prolific dogs. This method can be used by breeding dogs to obtain a variety of hybrid advantages and improve their growth. Fifth, the number of breeding. General mating 2 times, the first mating and the second mating interval 24-48 hours. Male dogs are only assigned once a day, up to a maximum of 2 times, and should be rested for 2-3 days after breeding, and the feeding and management should be strengthened. A dog must not be mated more than 40 times in a year and be as uniform as possible. VI. Precautions for breeding (1) Breeding time is generally the best time for the mental state of the morning dog, and winter should be performed when the weather is warm at noon. (2) Feeding is not allowed before mating and within 2 hours after mating, to avoid reflex vomiting during mating. (3) Breeding is best carried out in the place where the bitch is kept. When the male and female dogs are mated, it is a stimulus to the other bitches, which can promote the bitch's estrus in the same period and facilitate the feeding management. (4) Do not crowd around during breeding and keep quiet so that the male and female dogs are not affected by the environment and conditions and affect breeding. (5) Do not force the male and female dogs to be forced when they are mated. The male and female dogs that are mated must not be strenuously exercised, nor can they drink water immediately. They should rest for a while, and then drink for a while. (6) In the process of mating, care should be taken to prevent the bitches from sitting down or lying on the ground, causing damage to the penis of male dogs. (7) Pay attention to the safety of humans and dogs during mating. If necessary, give the dogs a cage to prevent biting and biting dogs. (8) Do a good job of mating records in time in order to accurately predict the expected date of birth and identify male and female dogs.
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