The founders have the final word when it comes to whether someone is accepted as a new member or not, and who will be designated his mentor. Because of the necessity in the founders maintaining the hierarchical structure of the Servants of Moo, no founder can ever reach the ultimate goal of a member of the Servants of Moo - to become a Moo Guru. That's nothing to worry about now. Consider the 1st word of Moo. A disciple is a member who has another member as his mentor.
Several members are disciples, but also have disciples of their own, and are therefore also mentors.
Each member, when first introduced into the ranks of the Servants of Moo, is assigned to another member who will then become their mentor. The relationship between a mentor and his disciples is a loose one, and no special privileges come from being a mentor or from being a disciple. Normally, new members do not receive disciples until they have established themsevles within the clan, properly. But then, things might change, it's not like this is written in stone. Consider the 6th and 7th words of Moo.