On the bird that flipped, if he thrashed when he was dying, he could have popped the bone out of his wing. One of the reasons I like my killing cone is it restrains the wings so that kind of injury doesn't happen. CX's seem to have fragile joints that pop out more easily than dual purpose birds do.
On the one with the leg injury, I would kill it now. It is unlikely that it will be able to heal because they get so big so fast that their legs have trouble keeping up without injuries. 4 weeks is the age they process Cornish Game Hens, so it will be small, but usable.
Too bad your neighbors are having so much trouble. If they aren't already, you might want to recommend feeding 12 hours on/12 hours off to see if slowing down the growth will help.
On the one with the leg injury, I would kill it now. It is unlikely that it will be able to heal because they get so big so fast that their legs have trouble keeping up without injuries. 4 weeks is the age they process Cornish Game Hens, so it will be small, but usable.
Too bad your neighbors are having so much trouble. If they aren't already, you might want to recommend feeding 12 hours on/12 hours off to see if slowing down the growth will help.