[TrishB]

I would suggest that you think of Champions / Breeding in the opposite direction. Think of it this way:

Can two Champions, from Champion bloodlines, generate both Champions and Pets? Yes!

In fact, in a litter of 8, you may not get ANY potential Champions - even though they themselves are form Champion stock. They'll still be lovely pets, with good temperaments (assuming of course that the parents had their health clearances and some working titles too).

Breeding is not an exact science. As the other poster noted - genetics can rear their ugly heads and create disqualifying traits. So if the general rule is to "Only breed to improve the breed" it goes to say that only the best of the best should be bred, to increase your chances of breeding a 'best' puppy!

So increase your chances! Breed only dogs that have earned titles both before (conformation type titles) and after their names (working type titles), that have the required health clearances (hips, elbows, eyes and heart). That way you'll maximize your chances of getting a great puppy. Compromising on any of the above really isn't an option.

Why take the chance of breeding less than the best? There are already SO many others out there that need homes that came from 'good pets'. Petfinder.com currently have 3073 Rottweilers that desperately need homes.