I learned something in K & L's links on the "Desparately needs
Advice" thread. http://www.perfectpaws.com/help2.html

Cats are not pack animals.They don't really care about
hierarchy. Cat societial makeup is not like humans or dogs
but something all their own. It explains it pretty well in the link
above. I guess I always knew this( sort of), but it's so foreign
to the human way of thinking. Cats are very interesting
creatures. Your cats might never be friends, but they will
probably eventually work everything out to their satisfaction.