The Kerry Blue Terrier was first bred as a versatile worker to hunt vermin, small game and birds, retrieve game from land and water and herd livestock including sheep and cattle.
Learn more about the breed history of the Kerry Blue Terrier at the related link.
I have a blue staffordshire bull terrier myself. I don't know when they where first bred both i was told that when you keep breding black staffordshire bull terriers over & over again and only with blacks eventually you get blue staffordshire bull terrier.
The Sealyham Terrier originated from England.
The Boston Terrier is a breed of dog originating in the USA. The blue breed has a blue tinge to it. They were bred for their size and used in pit fights.
They were originally bred for dog fighting.
as rat catcher
pest exterminator
They were first bred as hunting dogs. For hunting rabbits and foxes etc.
It was first bred as a hunting dog and a pest exterminator.
as hunting dog
for catching rats
for hunting small animals
The Cesky Terrier was first bred to hunt small mammals, birds and wild boars in packs in the forest of Bohemia, Europe. Learn more about the breed history of the Cesky Terrier at the related link.