Okay Ive seen some things mentioned that sound like negatives for Cornish Rocks or Xs or something..and Ive seen other things about different breeds and getting too big too fast or something? So are there breeds that your only suppose to raise for a short time b/c they get big fast and need to be culled? Is that why Cornish Rocks are not recommened? Any other breeds? If going to use a bird for meat how old is the best time to use for meat?