The Bulldog, is not recognised in any colour not listed in the breed standard by the Kennel Club. For example Tri/ Black and White /Black /Blue/Lilac /Chocolate are all marked on their Pedigree as Non Breed Standard Colours.
The Kennel Club refuses to register Merle in this breed as it is known to have proven health issues.
Unethical Breeders are promoting these colours as ‘RARE’ Don’t be fooled into purchasing one of these puppies and sometimes paying outrageously high prices.
Please find a reputable knowledgeable breeder who will help advise you in your hunt for a healthy Bulldog Puppy.
Look up Breed Club secretaries on this site who can help you contact breeders.
No responsible & ethical breeder will ever breed these colours intentionally.