
Personally, I would say there is no hard and fast rule. I would decide by the size of the litters, the age of the bitch, and the bitches personallity - some are born mothers, others are not. I certainly would not rule out a third litter from my girl if her "perfect" dog came on the scene. Having said that, I would not be heartbroken to stop at two litters from her if I don't find another stud which I think could help her to produce puppies even better than she's already had.