aj said:
Study after study after study sites that bigger bwt's cause dystocia in beef production. The bigger bwt calves have a higher incidence of having a front leg back. I don't think this is argueable. Even with antedotal evidnce from a 750 head cow herd in Canada. We have a big birth weight problem in the Shorthorn breed. The latest herd bull issue states this. I don't see how we can ignore the problem.
I will agree with you that birth weights in any breed must be a constant concern.. but we also need to be talking more about calving ease than just birth weights. We have had this discussion on here more than a few times now, and I think Shorthorn breeders are working at this. I do not see the huge problem you continually post about, in my herd, and if I did, I would be probably as vocal as you are about this problem. As I have mentioned a few times before, we have calved reasonable numbers of some other breeds along side our Shorthorns in past years, and we have found that our Shorthorn herd has consistently had fewer calving issues. We have had herds of 50-100 head of Charolais, Hereford, Simmental,and Maines, along with smaller groups of a few other breeds. We decided a few years ago, to concentrate on the Shorthorns as they were the most troublefree breed we have had here. There are many other factors that contribute to calving issues other than just birth weights. I am sure there are some who have huge issues with calving problems, but I am thinking that a portion of their problems are created when they try to breed females that do not have proper structure to calve easily. There are some females that would struggle having a Longhorn calf.. and they can be found in most breeds. That said, I agree that we need to always be conscious of birth weights, but we also have to be conscious of numerous other issues that contribute to calving problems.
I have a commercial bull buyer who has now purchased 17 Shorthorn bulls from us in the past 10 years. He was using Charolais and Angus bulls prior to his first Shorthorn bull. His cows have to calve on pasture with little supervison and he is now using only Shorthorn bulls, because he says he has fewer calving issues from the Shorthorn sires he has been using. Two years ago, a commerical man who has 800 cows, purchased a bull in our bull sale. The bull he purchased had a BW of 105 lbs and I shuttered when he told me he had used him on his yearling heifers. When I asked him if he had many calving issues, he said he wished the Shorthorn bull had bred all his heifers, as he had virtually no problems from him, but he had to pull almost every calf sired by the Polled Hereford bull he had run in the same pasture.
I have also commented on this before as well, but we have sold over 300 bulls since I made a decision to not keep any bulls intact with BWs of 110 lb or more. These bulls have sold to herds with as many styles of management as you can imagine, and I have not had a single complaint regarding calving issues from our bulls. I would think that someone would have told me that they were having problems if this was as big an issue as you continually say it is.
We all need to use some common sense when selecting our breeding stock and we also have to have a pretty good understanding of basic structural soundness in selecting replacements for our herds.