The prenatal signs of a Rottweiler include: restlessness, shortness of breath, reduced eating, and reluctance to move. These conditions indicate that labor is about to begin. When there is fluid or blood flowing out of the dog’s butt, it means that the dog is about to give birth and will be born soon. Pups are born in 8 hours. If the breeder is careful enough, he will feel that the dog's body temperature has dropped and the breasts will be swollen and pink and translucent three days before delivery. These are subtle prenatal signs.