I'm not sure how old this thread is or if your still looking for Colubian Rocks, but I'll have hatching eggs in the early spring when they start laying again.
I've never looked twice at the bantam rocks today until I went to a poultry show today. I came home with a silver penciled trio and a partridge pullet that are gorgeous! I will post individual pictures when I get a chance.
Are the bantam rocks inclined to fly at all? My LF barred rock does not. I do prefer birds that are okay with flying since I like to free range as much as possible.