Types of terriers include Irish Terrier . The FÃ dÃ ration Cynologique Internationale subdivides the Terrier Group into Sections , including Large and medium-sized Terriers , Small-sized Terriers , Bull type Terriers , and Toy Terriers , while other major national kennel clubs do not subdivide the Terrier Group , although some terrier types are placed in the Toy Group by some kennel clubs , and some terriers are placed in other Breed Groups .