The most obvious sign of French bulldogs before giving birth is that they become more anxious, irritable, restless, vomiting, thirsty, and breathing faster. In addition, dark green secretions will flow from the vagina about half an hour before giving birth, and the nipples will become more swollen, which can Express milk. If the above symptoms appear in your French bulldog, it means that the birth is about to occur. You need to prepare the delivery room, allow the dog to give birth in a quiet environment, and pay attention to the dog's condition.