The menstrual cycle of dogs is somewhat different from that of humans. Usually, only those who are conceived will have ten months of pregnancy, while the dog will prepare a 2-month hotbed to complete the estrus cycle, which is the nature of wolves raising together.
As we get older, hormone disorders will cause abnormal gland hyperplasia in the endometrium. In addition, the influence of hygiene habits, bacteria from the mouth, intestines and even the ground will have the chance to enter the uterus, causing serious bacterial infections and causing pus storage.
As long as the unspasted bitches are likely to accumulate pus, this disease will not be different from the dog breed. Usually, older dogs are more likely to occur. Dogs with female hormone-related drugs, disordered estrus cycles, and pseudo-pregnancy are even more dangerous; bitches who have given birth to babies and incomplete ligation are also easy to replace uterine pus