Sorry for the delayed response - had to watch the Bucs lose to Atlanta (sigh). We have family up in NC but something you should know - Aussie Blue Merles (M&F) should not be bred together - a high percentage of the offsping are blind and have other problems.
They can be bred with tri-colors and red Merles - litters tend to be a few of each color. Maybe Rush and Sophie can just be good friends ... ;-)