Carrie,

Now that I think of it, Cassie is also maybe borderline dominant too, although, Graham is just a small amount more. Cassie will try to get in the door first (it seems that she really wants to be first) and she will try to rush her way to the water first after a walk, but because she's so small, she's real easy to "push out of the way" which Graham will do. Maybe because both of them are not strong alpha or omega, it may take awhile to develope their roll with each other. Geez I hope it's a good match with them.