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					Originally Posted by  JRODSHDYORKIES     I once bought a yorkie from a pet store and never had a health problem with her.  . What is a Byb?     |  
 
  A BYB is a backyard breeder. It's someone who breeds without performing proper health testing and without regard to breeding for bettering the breed. It can be applied to anyone who purposely mixes breeds, breeds undersized females or breeds off-standard yorkies. 
As for pet stores, their dogs are obtained from puppy mills where the breeding dogs are confined to their entire lives in cages.  No health testing is done. These poor dogs lead a cruel and miserable short life.