I am 90% the answer is rat catching. Most terriers were bred for pest control either rabbit or rat. If you put Boston terrier rat into google a lot pop up
Some health problems that Boston Terriers are prone to include breathing problems, eyes problems and heat strokes, but it is possible to get a health breed.
History on the Boston Terrier. Bred down in size from pit-fighting dogs of the bull and terrier types, the Boston Terrier originally weighed up to 44 pounds (20 kg.) (Olde Boston Bulldogge). It is...