i forgot about animal path xD but if he realizes that attacking the cerberus is pointless and concentrates on killing the pain that can ressurect and the one that uses summonings, which he has a chance to do because he is really fast, its possible for him to defeat the 6 paths
how many times did cerberus multiply b4 jiraiya stopped using physical force?,besides,he will have other summons as well to fight before getting near the animal path,not to mention the invinsible chamelion summon.he isnt getting past the animal path