They take the top 25 champions by points- some dogs have points , but uh passed on or retired. After the top 25 champions and they dont have the 25 then they turn to points. Puppies qualify if like, in my case, puppies have beaten open dogs/bitches.
I know its complicated- but the purpose of dog shows is to determine breeding stock, and this show is only once a year- verses other KC's ( kennel clubs) that have a fall show etc then a summer or spring show.
You will the comments of " this is a young dog of 18 months" and notice the registered name DOES NOT have Ch. ( Champion) by it.. That is how they got there. LIke cockers are easy or goldens but like Borzois, or Salukis or Beacherons etc- there arent enough pointed dogs to fill the show.. See? Thats how it happens..