The Sussex Spaniel and English Cocker Spaniel are both what? 
dog
Title: American Cocker Spaniel
Passage: The American Cocker Spaniel is a breed of sporting dog.  It is a spaniel type dog that is closely related to the English Cocker Spaniel; the two breeds diverged during the 20th century due to differing breed standards in America and the UK.  In the United States, the breed is usually called the Cocker Spaniel, while elsewhere in the world, it is called the American Cocker Spaniel in order to differentiate between it and its English cousin, which was already known as "Cocker Spaniel" before the American variety was created.  The word "cocker" is commonly held to stem from their use to hunt woodcock in England, while "spaniel" is thought to be derived from the type's origins in Spain.
Title: Sussex Spaniel
Passage: The Sussex Spaniel is a breed of dog developed in Sussex in southern England.  It is a low, compact spaniel and is similar in appearance to the Clumber Spaniel.  They can be slow-paced, but can have a clownish and energetic temperament.  They suffer from health conditions common to spaniels and some large dogs, as well as a specific range of heart conditions and spinal disc herniation.
Title: English Cocker Spaniel
Passage: The English Cocker Spaniel is a breed of gun dog.  The English Cocker Spaniel is an active, good-natured, sporting dog standing well up at the withers and compactly built.  There are "field" or "working" cockers and "show" cockers.  It is one of several varieties of spaniel and somewhat resembles its American cousin, the American Cocker Spaniel, although it is closer to the working-dog form of the Field Spaniel and the English Springer Spaniel.
English Cocker Spaniel Sussex Spaniel