The Animal path (畜生道, Chikushōdō) was the second of the bodies in Nagato's Six Paths of Pain. Jiraiya incapacitates this body and sends it to Konoha, where it proves instrumental in discovering the secret behind Pain. The former Animal path was destroyed by the Preta path during Nagato's invasion while fighting Kiba Inuzuka and Tsume Inuzuka. This body was replaced with a new Animal path shortly before Pain departed from Amegakure.
Prior to Jiraiya's encounter with Pain, one of his subordinates noted that some believe Pain to have been from the Fūma clan. This is because the body was originally that of a man from the Fūma clan, recognized by Jiraiya as a man who had ambushed him, ending up scarred across the forehead in the process.