* Individual Variation: Like humans, Rottweilers have different genetics and growth rates. Some pups are naturally bigger than others.
* Litter Size: Pups from larger litters may be smaller at birth due to competition for nutrients in the womb.
* Mother's Size: The mother's size can influence the size of her pups.
However, you can expect a healthy 1-week-old Rottweiler puppy to weigh somewhere between:
* 1.5 - 2.5 pounds (0.7 - 1.1 kg)
Important: If you're concerned about a puppy's weight, always consult a veterinarian. They can assess the puppy's overall health and development.