1. Vaginal bleeding: This is the most obvious symptom. Menstrual blood flows out due to the relaxation of the cervix.

2. Decadence and depression: At this time, the dog may feel uncomfortable, manifesting as decadence, depression, loss of appetite, etc.

3. Nervousness: During this period, nervousness caused by changes in hormonal levels may make the dog more agitated and more likely to quarrel.

4. Increased frequency of urination: During menstruation, due to congestion of the tissues around the vagina, urine needs to be discharged more frequently.

How to care for dogs during menstruation:

1. First of all, ensure the hygiene of the dog’s living environment. Dogs in estrus are relatively weak, and their vaginal passages are open and they are easily infected with bacteria.

2. You can clean the dog’s vagina appropriately and wipe it with warm water to ensure the hygiene of the vagina.

3. The dog can wear menstrual pants to prevent blood from dripping everywhere, and it can also prevent male dogs from mating with it.

4. During the dog’s menstrual period, be sure to keep the dog warm. The dog’s resistance is reduced and it is easy to catch a cold.

5. It is best not to take a bath, because bacteria can easily flow into the dog’s vagina with the bath water and cause infection.

6. If you don’t want your dog to get pregnant, be sure to isolate it from the male dog to prevent unwanted pregnancy.