Personally I agree with this, but there is "some" evidence that it is healthier for the bitch to be bred on successive heats than to have a heat cycle without breeding. Going through heat without breeding is hard on the repro system, according to some repro specialists. Of course this would also depend on the bitch being COMPLETELY back into shape before breeding again.Ken Newcomb said:
However, I only breed to get myself a pup and cannot handle pups that close together, plus I like to see how the first pup turns out before breeding again. So I would never breed back to back for those reasons.