As the saying goes, good breeding breeds good puppies. If you want to breed a batch of high-quality purebred puppies, you must have excellent breeding dogs. Whether it is a purebred female dog or a purebred male dog, both are necessary. If you have a good purebred female dog, you should choose a male dog of the same breed with higher purity as her "wishful husband" as soon as possible. ". Therefore, the male dog you choose must be a purebred dog with standard size, strong body, and experience in mating. Similarly, a purebred male dog also needs a purebred female dog to breed the next generation of excellent puppies. So how to choose a breeding male dog and a female dog? The requirements for a good male dog are as follows: 1. Pure breed. The dog has strong fertility and is a purebred dog within three generations; 2. The height is moderate. Male dogs do not need to be too tall to avoid difficulties during mating; 3. In good health. Do not be too fat or too thin, be energetic, have a tall physique, have broad forequarters, strong hindquarters, flexible movement, straight and strong limbs, bright and energetic eyes; 4. Reproductive organs must be well developed. Cryptorchidism, single testicles and swollen testicles do not meet the requirements. The scrotal skin is soft and delicate, close to the abdominal wall and not saggy. 5. Strong male. When a female dog is in estrus and is close to a male dog, she likes to climb astride her, or she can actively climb astride him for mating without flirting with the female dog. A good breeding female dog mainly depends on the following characteristics: 1. Good health; 2. Give birth to many litters; 3. Well-developed breasts and strong lactation ability; 4. Strong mothering ability and good raising of litters. Dogs with good maternal qualities are shown by wadding the nest before giving birth, breastfeeding the puppies regularly after giving birth, rarely leaving the nest, and often licking the puppies with their tongues. After 1 month, it can spit out food to feed the puppies, and when the puppies climb out of the nest, they can carry the puppies into the nest with their mouths. If it is the opposite, it is considered that the mothering quality of this female dog is not good, and it is not recommended to select. There are also some female dogs that have the habit of eating puppies or defecating in the nest. Female dogs with these two behaviors must not be kept for breeding purposes! In addition, if you are planning to introduce a breeding female dog, you also need to consider a few issues: 1. A good super female dog may not be able to breed excellent offspring. 2. Super breeding mothers that can breed excellent puppies are not sold by ordinary kennels, and the price is sky-high. 3. When introducing a good breeding female, you should consider whether it can be combined with the breeding male bloodline of your own kennel. 4. In kennels that use systematic breeding, most of their genes are retained in the breeding mother. The introduction of breeding males is to improve existing shortcomings. The effect of introducing breeding females will be slower (slower breeding speed).