A Bulldog and a Pekingese are not eligible to enter the Best in Group competition at Crufts after failing new vet checks put in place to ensure the animals are healthy.
The Kennel Club introduced these new checks to Crufts 2012 to ensure that the Best in Breed award is not given to any dog that may need pet medication for health or welfare problems.
These checks have been introduced to 15 breeds, including the Basset Hound, Bloodhound, German Shepherd, Shar Pei and Pug.
Caroline Kisko, Kennel Club Secretary, said: "We are determined to ensure that the show ring is a positive force for change and that we help to move breeds forward by only rewarding the healthiest examples of a breed.
"The veterinary checks were introduced to ensure that dogs with exaggerated features do not win prizes."
This follows a BBC documentary, Pedigree Dogs Exposed - Three Years On, which looked at the health problems that are caused by breeding pedigree dogs.