What dogs have biggest cocks?

The size of a dog's genitalia can vary widely among breeds, but larger breeds like Great Danes, Mastiffs, and Saint Bernards tend to have larger anatomy overall, including their reproductive organs. However, it's important to note that size does not determine a dog's health, behavior, or suitability as a pet. Each dog is unique, and responsible breeding practices focus on health and temperament rather than just physical traits.