The term 'BIG DOGS' can be summarized by two crossword solutions: Labs (4 letters) and Mastiffs (8 letters). Labs are a type of retriever that is known for its intelligence, loyalty, and friendly nature. They are considered to be one of the most popular breeds of dog in the United States. Mastiffs are large, powerful dogs that were originally bred for guarding and protection. They are known for their strength and courage, and are often used as guard dogs.