We got our first Carnac out of a mature cow a couple days ago. The calf weighed 78 pounds out of a mature 1/2 blood Maine cow that normally has big calves and went 283 days. Its is a nice solid black heifer calf, but we did have to help it nurse. The cow did not have trouble because I was their, but it seemed a little dumb. The cow is 9 years old and never had a dumb calf. The calf is good haired and extended out through the neck. However, she does turn out a little more than desired on the front, average bone, and is not overly thick. The cow is phenotypically correct and does not have any structural issues. So I would watch Carnac with the front ends and soundness. I would say at this point we have been more impressed with our My Turn and Sun Seeker calves. JMO