I have a whole flock of 6 week old Cornish X birds that I've been raising for butcher. I bought 50, lost a few for various reasons and by week 4, was down to 45. Then, I started to loose them at the rate of 1 per day. That was last week. Now, for the last 3 days, I have been loosing them at the rate of about 3 per day. What is wrong? They have good shelter, constant access to water and I have been rationing their feed since they were 2 weeks old. At first I would put it out in the morning and take it away at dinner time. But when they started dying (one per day) I cut their feed in half and have been giving them half in the morning and half again in the evening so that they can't gorge themselves. Why are they still dying? Some look lethargic, but it is even the energetic ones that are keeling over.