The term 'DOG; FIGHTER' can be broken down into two crossword solutions: 'DOG' and 'BOXER'. 'DOG' is a common term for any canine species, while 'BOXER' is a breed of DOG that is known for its strength and agility. Boxers are often used in the sport of boxing, where two dogs fight each other in a ring. They are also used in other forms of DOG fighting, such as pit fighting. Boxers are loyal and protective companions, making them popular family pets.