The phrase "certain breeds" refers to specific types or varieties of animals that belong to a particular group, species or family. The term is often used in relation to dogs and other pets, where it describes certain characteristics or traits that are common among members of the same breed. For example, "certain breeds" of dog may be known for their loyalty, intelligence, or ability to perform specific tasks such as hunting or herding. The phrase can also refer to plants or crops that belong to a particular species or variety, and have certain characteristics that make them suitable for specific uses or environments.