Toy Bulldogs are one of the extinct bulldog breeds. This breed was from England, and it was famous in England during the 18th century and early 19th century.
The primary goal of the breeders in developing this breed was to create a companion dog with fewer health problems at a small size.
Some believe that breeders were working in opposing directions to develop this breed.
Some breeders were working to reduce the size of bulldogs, but that could not be very successful because of the complications with breeding.
As a result, dwarf-sized puppies are frequently born to regular-sized parents. And very often, regular-sized puppies are born from regular-sized parents.
And even this did not fulfill the purpose of developing this breed, because they were not healthier and were not the most fertile dog breed.
Some believe that breeders were working in opposing directions to develop this breed. That is how this breed never became successful and never established.
There was another attempt made to develop the toy bulldog by cross-breeding bulldogs with French bulldogs to reduce the weight by up to 20 pounds or so.
But again, this experiment could not be successful as per the recognition point. Because of a lack of prevention measures, people did not consider this breed as it did not fit the bulldog standard.
So people really did not care about it. And some believe that the Great Miniature Toy Bulldog breeds became extinct by 1925.