Symptoms of a female dog in estrus:

1. The female dog’s vulva will be swollen.

2. The female dog begins to lick her reproductive organs frequently.

3. It will be more interested in getting close to male dogs.

4. Female dogs will emit a smell when they are in heat, so many male dogs will gather outside the house.

5. Behavioral changes: For example, the female dog has increased excitability, increased activity, restlessness, loud barking, decreased appetite, frequent urination, and raised tail and arched back.

Precautions for female dogs in heat:

1. Dog owners are particularly reminded that vaccinations should not be administered during pregnancy, as this will harm the baby in the fetus. .

2. Dogs’ estrus is divided into two types: “bloody estrus” and “bloodless estrus”. Most dog owners only know that a dog's vaginal bleeding is in heat, but there are a few dogs that do not bleed when in heat. So you have to judge which type of estrus it is based on the dog’s behavior and physiological changes.