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Breeding / Calving Issues
Gestation Length too short?
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<blockquote data-quote="simme" data-source="post: 1746933" data-attributes="member: 40418"><p>Finished weighing and weaning my fall calves. Best average weaning weights I have ever had. Average weaning weights on the bull calves was 769. Average on the heifer calves was 686. Those are adjusted to 205 day and adjusted for age of dam. BIF makes adjustments for dams less than 5 years old and older than 10 years to level the field for comparison. Without the age of dam adjustments, average for bulls was 742 and average for heifers was 655 at 205 days. </p><p></p><p>Average gestation length this calf crop was 279 days with the shortest being 271 and the longest 286. Seems to me that gestation lengths have decreased since the old fullblood and fleck simmentals of the 70's and 80's - along with the reduced birth weights. Average birth weight on the calves was 73 pounds.</p><p></p><p>Hauled the last two cows away to a different pasture yesterday. Calves don't seem to care, but dams are vocal and restless today. These are a pair of 3 year olds that are 3/4 sisters. Cow in foreground is the dam of "Peanut" and the one in back has the heifer calf sired by the 1998 born Power Drive bull and is now bred to the 1986 born bull 600U. (She has a thing for older bulls). Real pleased with the condition of these two at weaning time. Two and three year old's sometimes struggle to maintain condition and breed on time. They have gained some weight since the grass greened up, but now face a summer on fescue. [ATTACH=full]16583[/ATTACH]</p></blockquote><p></p>
[QUOTE="simme, post: 1746933, member: 40418"] Finished weighing and weaning my fall calves. Best average weaning weights I have ever had. Average weaning weights on the bull calves was 769. Average on the heifer calves was 686. Those are adjusted to 205 day and adjusted for age of dam. BIF makes adjustments for dams less than 5 years old and older than 10 years to level the field for comparison. Without the age of dam adjustments, average for bulls was 742 and average for heifers was 655 at 205 days. Average gestation length this calf crop was 279 days with the shortest being 271 and the longest 286. Seems to me that gestation lengths have decreased since the old fullblood and fleck simmentals of the 70's and 80's - along with the reduced birth weights. Average birth weight on the calves was 73 pounds. Hauled the last two cows away to a different pasture yesterday. Calves don't seem to care, but dams are vocal and restless today. These are a pair of 3 year olds that are 3/4 sisters. Cow in foreground is the dam of "Peanut" and the one in back has the heifer calf sired by the 1998 born Power Drive bull and is now bred to the 1986 born bull 600U. (She has a thing for older bulls). Real pleased with the condition of these two at weaning time. Two and three year old's sometimes struggle to maintain condition and breed on time. They have gained some weight since the grass greened up, but now face a summer on fescue. [ATTACH type="full"]16583[/ATTACH] [/QUOTE]
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