Out of Jesse and Sammy, Jesse is definetely the boss. Sammy always follows her and Jesse gets EVERYTHING first. Sammy now refuses to because she knows Jes is in charge. Jesse and Sammy have never been in a fight, but Jesse will mouth her once in a while when Sammy has forgotten her place. I have to have seperate bowls for them because Jesse chases Sammy off if they share.
I guess that I would just observe your dogs and see who leads the other one around, eats first, etc.
Hope that helps!