I agree. In fact, if he would be willing to take over all feeding chores and anything else he can, it would speed up the process. For such a small dog, it might help if your husband would stoop down to give Queenie a treat so he doesn't seem so threatening. Sitting at her level--on the floor-- without interacting will show her that she has nothing to fear, especially if the other dogs are getting attention.

Good luck!

Mary