McMurray hatchery offers 2 meat birds. One is the"Jumbo Cornish X Rocks" and a"Cornish Roaster". They say that the roaster takes a week or two longer but that many of the health problems are avoided. Has anyone here had any experience with these two types of birds? I have visitors come to the farm and I want something that has an attractive appearance. Or, something that doesn't look pitiful. I'm going to raise them in a chicken tractor so they have fresh grass every day. This is more to keep them on clean ground. Any suggestions?