Why? - Page 2

tarekallam:
So you as a professional breeder cannot guarantee that if you breed a top male to a top female you will get a tip top litter.

Is it at the end of the day is totally a matter of luck?

NO. It is a matter of knowledge.
I have been typing my fingers off here  saying just that for a year now. Look at some of my other posts. Just because you put great male and great female together does not mean that you will get great pups!!!!!!!!!!!!!!!!!!!!!!!!!!!!! If you do that haphazardly the chance is 90% of the times it will not work out.
When you are breeding 2 dogs you breeding all their pedigrees and you need to know how to match and compliment the sire and dam's pedigrees. You need to know the virtues and the faults of all dogs at least 3, but preferable at least 5 generations back. You need to know what their litter mates are all about too and what all the dogs and hopefully all their litter mates produced too. In Europe when you breed there is a knowledgeable breed warden who approves your breedings and gives you recommendations.  Here people put two Czech  or Germ,an dogs together and call it pups from Czech or German lines. No they are NOT unless they were bred with the particular knowledge of the dogs on the pedigree.
Prager Hans
http://www.alpinek9.com

apoArmani- very good & simple explanation that I should thank you for.

pedigree=documented family/tree; the more you know, can be informed about the producing tendencies about all the individuals on that piece of paper (and better still even their brothers and sisters), the better off you will be when coming to select future mating partners of future off-spring! No guarantees, BUT, well educated, and calculated selection process is what (eventually) brings the results targeted by each individual breeder.

Anything else is 100% experimentation/gamble and/or pot luck.