I picked up our meaties from a feed store, they get their birds from McMurry. They don't seem to be growing as fast as they should. I thought maybe it was because I wasn't using a feed with a high enough protein content, 18%. I was at another feed store and asking about their highest protein count which was 27%, and told him what was going on with them not growing. He asked where I got them from and he said that there have been other folks that have told him that they are having the same problem. He gets his birds from Belt hatcherie and hasn't had that problem. He also said that he had a coustomer buy some Belt meaties and some from McMurry and the McMurry meaties are growing much slower. We are mixing the 18% with the 27% with hopes it will help them out. They are almost 7 weeks and no where near butchering weight. They aren't even as big as our smallest hen. Has anyone else had a problem with their meaties growing slow?