I don't know how valid this statement is, but i have heard that it may depend on when they were made during the mating process. Since the eggs can be fertilized during different mating moments, for example if the breeder tries twice during the heat cycle say once at the beginning and once at the end. Like I said, not sure how valid this theory is, but since the pups are born at the same time it may account for the smaller growth size.
Max is 5 lbs and Abby is 3.1lbs and they play and romp all the time. No doubt about it, Abby is the boss here. |