I've been so frustrated with the CX chicks I've tried to raise. After having really great luck with egg layer chicks of multiple varieties (not loosing any except for a few during shipping) or Red Rangers (ditto) or Freedom Rangers (lost NONE ofa 35 order) I seem to have a high mortality rate with my CX chicks. They will be running around looking healthy as can be when I check on them before bed and then wake up to find one lying on its back, dead the next morning. I lost 3 out of 10 of my first batch, about one a week during wees 2,3 and 4. This batch I ordered 18 and 9 arrived dead. Of those 9 that arrived alive I've also lost 3 but they were all about 48 hours appart when they were between 1 and 2 weeks of age. In all my frantic questioning of what might be happening and what I could do differently, I never got much of an answer on this forum. However, this weekend while shopping for kitchen appliances I picked up this book at Lowes on chicken breeds and started flipping through. I was tickled to find Freedom Rangers listed and was reading through the breed description when my attention was caught by the phrase "while heartier than the CX, Freedom Rangers are still prone to Sudden Death Syndrom or 'Flip-over Disease'". I came home and did a Google Search for the terms and found this article. It is too late for my poor lost broiler chicks, but might be helpful for others: http://www.merckmanuals.com/vet/pou...udden_death_syndrome_of_broiler_chickens.html I think that this is exactly what I was seeing.