Stickers is absolutely the boss. She is not aggressive in any way to Rusty but tends to be the leader. Rusty would definitley not do well as an only dog. He needs her to tell him what to do and when to do it. He's seems to be happier that way. That's why the two of them work so well together. They each have established their place in the pack and are happy with it.
I fill those same kind of bones up with peanut butter and freeze them. They make an awesome treat that the dogs LOVE and it takes a good while for them to eat all of the frozen filling out! Plus it is alot less expensive than buying new ones every time. ( I also run them through the dishwasher to keep them clean after they chew on them)
I enjoy your pictures and video's, I can't get mine to share the sofa.... much less than sharing a bone, I can't even spend time with one without the other one getting jealous. I know you are proud of your hounds they are beautiful.