Can the female rottweiler get pregnant before day 8?

Yes, a female Rottweiler can become pregnant before day 8 of her heat cycle. Typically, a female dog is most fertile during the estrus phase, which usually occurs around days 9 to 14 of her heat cycle, but sperm can survive in the female's reproductive tract for several days. Therefore, mating can result in pregnancy if it occurs before the peak fertility days.