Precautions for female dogs during pregnancy:

1. During pregnancy, female dogs should be careful not to exercise strenuously to avoid miscarriage.

2. Nutrition of female dogs during pregnancy is very important to ensure the health of the dog and the normal development of the fetus.

3. Be careful not to feed your dog with sharp bones during pregnancy. Broken and sharp bones can easily stab the dog's throat or cut the dog, leading to miscarriage.

4. Be careful not to feed watermelon to the female dog during pregnancy, because diarrhea may occur.

5. Make sure the dog gets enough rest during pregnancy, because the abdominal pressure of the dog will increase during pregnancy and the dog will become agitated.