I purchased cornish rock x from welp this yr. my first time from them, not first time raising meaties. I am having a hard time with birds unable to walk. these are not fat birds, but small ones. generally about 5-6 weeks old, one leg just can't support them. I find no problem with the leg itself except maybe a callus on the foot pad of one foot. it has happened to 5 birds of 30 and when they were butchered, the bone in that leg is very red, like bruised. just the bone, not the skin or meat. feeding them chick starter then at 5- 6 weeks, changed to broiler maker. these birds just can not walk. had one last night that can't use either back leg, sits on it's rump. that one needs to go, anyone else having this problem? (mine are kept on 1x1 wire as I have done for the last 3 yrs- only seems to affect the smaller birds, not the big ones in the lot) maybe they are getting pushed around too much? all are the same age so I have no idea what could be causing this.