My cornish x are a little over 5 weeks old and everything has been going good so far. I started out with 26 and had a couple die early. I have had the last 24 up until now. I went out this morning to move their tractor and noticed one of the birds was dead and two more were on the way to being dead. One of the two that were dieing could not get up and it was the bird that had been lame for a while. The other one was just kind of shaking and would not open its eyes. I culled the two birds and threw all three out back for the coyotes or whatever else is back there. The birds were about 3.5 to 4 pounds except for the small one. So now I am down to 21 birds. I expected a few to die but I am up to 5 dead now. The rest of the birds look good but who knows. We did have some lightning and wind the other day. I am not sure what else to do now except wait and see how the rest do. I have been feeding 12 on and 12 off up until I realized that they do not eat once it gets dark. I am feeding Blue Seal Chick N Game Bird starter/grower crumbles 22%.