Dogs exhibit several characteristics and behaviors after becoming pregnant. Here are some common signs :
1. Enlarged breasts: The breasts of a pregnant dog will gradually enlarge in the first few weeks of pregnancy.
2. Weight gain: Pregnant dogs will gradually gain weight in the first few weeks of pregnancy.
3. Increased appetite: Pregnant dogs usually have a greater appetite because they need extra nutrition to support the growth of the embryo.
4. Behavioral changes: Pregnant dogs may exhibit different behaviors, such as being more active, more dependent on their owners, or more anxious.
5. Abdominal swelling: The abdomen of a pregnant dog will gradually swell during pregnancy, especially in the later stages of pregnancy.
6. Becomes easily tired: Pregnant female dogs may become more easily tired or appear more lethargic.
If you notice any of the above characteristics in your dog, she may be pregnant. However, the most reliable method is to take your dog to a veterinarian for examination. The veterinarian can confirm whether your dog is pregnant through an ultrasound scan or blood test.

If your dog is pregnant, here are some things to keep in mind:
1. A balanced diet is essential: Pregnant dogs require extra nutrition to support the developing embryos, so provide them with high-quality, easily digestible food. Avoid feeding them foods containing harmful substances such as caffeine or chocolate.
2. Provide sufficient rest: Pregnant dogs need plenty of sleep and rest to ensure their bodies can adapt to the changes during pregnancy.
3. Regular check-ups: Take your dog to the vet regularly for check-ups to ensure the pregnancy is progressing normally and to address any problems promptly.
4. Avoid excessive exercise: Pregnant dogs should not engage in excessive exercise, as this may increase the risk of miscarriage. However, they should not be kept completely sedentary either; appropriate light exercise can help maintain their health.
5. Provide a clean and comfortable environment: Pregnant dogs need a clean, quiet, and comfortable environment to rest and give birth. Ensure the bedding is dry, provide sufficient water and food, and adequate space for them to give birth.
6. Prepare whelping tools: After your dog becomes pregnant, you will need to prepare suitable whelping tools, such as a clean, warm and safe place, some towels and paper, etc.
In short, your dog needs extra attention and care when she is pregnant. Take her to the vet regularly for checkups to ensure the pregnancy is progressing smoothly, and adjust her diet and exercise appropriately to ensure she stays healthy during her pregnancy.

Changes in a dog's personality after pregnancy
Pregnant dogs may exhibit personality changes; here are some common ones:
1. Becoming more attached to their owners: Pregnant female dogs may become more dependent on their owners, and will be more affectionate and seek their companionship.
2. More docile: Pregnant female dogs may become more docile and less active.
3. Stress or confusion: Some female dogs may exhibit stress or confusion during pregnancy because they feel changes happening in their bodies.
4. Sleep more: Pregnant female dogs may become lazier and prefer to sleep more.
5. Increased protectiveness: Pregnant female dogs may become more protective of themselves and their families, and become wary of other dogs or strangers.
In short, during a dog's pregnancy, you need to pay extra attention to her behavior and mental state, and help her get through this special period by providing appropriate attention and care. If you notice any abnormal changes in your dog's behavior or mental state, it's best to consult a veterinarian promptly.
