
CC is short for Challenge Certificate. In the UK a dog or bitch must win 3 CCs under 3 different judges, and one at least must be over the age of 12 months, (If a puppy gets 3 or more CCs it won't be a Champion until it gets one as an adult).
The KC awards different numbers of sets (one for best dog and best bitch) of CCs for different breeds. It is based on the popularity of the breed, numbers shown and bred. In my breed we have 18 sets per year (only 16 last year due to Foot and Mouth). At a Championship show there will be at least 5 classes per sex, the winners of each of these 'challenge' for the CC (a judge may choose to not award if quality of exhibits is low). A reserve CC is awarded (or not) to the second best dog or bitch that is also in the judges opinion of such outstanding merit to be awarded the title of champion. The reserves can sometimes become the real thing if the CC winner should be disqualified!
Unlike some other countries in UK the champions continue to compete for the CCs, so a CC win means that you are the best of your sex (in that judges opinion) and not just best of the non champions! This is why you will hear of the term breed recors holder, which mens the highest number of CCs won by any dog of that breed, In mine I think the record is 43 or 34, Jackie H may know :D
There were 6 Elkhounds that became champions last year, and looking over last 15 years one year there were only 2 and another there were 10, but on average there are 6 new Champions a year (that is altogether, dogs and bitches). It is said that we have the hardestr system to make up a Champion in the world, so the tiltle is more meaningful!
So not all breeds can make up Chmpions in Britain. there are even a number of quite strong breeds, like the Malamute that do not have them!