The three Mad Dogs (or the three Pitbulls from Bayroad), are the three Pitbulls Baylord Yama sent to become Regulars to show how strong his mad dogs were. They all carry the blood of powerful Families due to being born through a special process known as blood fusion; it is a method where two or more powerful bloodlines are mixed and injected. Since the three pitbulls were born through this blood fusion process, they all possess unique and strong powers that are unmatched by ordinary Regulars.
One of the pitbulls is Varagarv, formerly the strongest E-rank Regular, and another is Buelsar Elliot who is currently allied with Rachel. The final pitbull has not been revealed yet.