I don't think I have made up my mind exactly what kind of chicken breed we want to add to our farm. We have a chicken coop that is not moveable and quite a distance from the garden where I would like to have them work :) We have a flock of 50 primary egg layers, ISA Browns and Barred Rocks. We would really like to build a chicken tractor and raise a flock closer to the main season garden, especially my asparagus patch.
I like the idea of dual purpose and I really like the idea of heritage breeds. After I did all the research, it appears that hybrid broilers aren't really sustainable, in my opinion. They have to be purchased every year. That sounds familiar :)