Page 18 - MWC 4-20-2023s

BREEDING SOUNDNESS The Midwest Cattleman · April 20, 2023 · P18
continued from page 17
bulls are sold as yearlings, season, the off season is the more inexperienced bulls. •Good semen quality
because breeders want to time to be reconditioning A BSE can determine a •Normal serving capacity
capture the genetics of a new your bull to prepare him for bull’s ability to be a produc- The Western College of
yearling in the first year. next season. tive member of your herd Veterinary Medicine in
About 2/3 of bulls reach ma- Colorado State Univer- through passing on his ge- Saskatchewan saw that in
turity (fertile) at 14 months, sity shows that bulls aged netics in the next calf crop. 2,110 bulls tested, 22.1% of
but oftentimes we can see 2 years had 120 mounts His productivity is directly bulls had at least one phys-
reproductive failure due to while bulls aged 3+ had connected with his physi- ical abnormality that could
bull immaturity. Only about 85.8 mounts, the 2-year-old ology as well as a built-in negatively impact repro-
35%, 60%, and 95% of 12-, bulls were responsible for a desire to breed females, we duction. WCVM looked at
14-, and 16-month-old bulls, 41.5% pregnancy rate while call this libido. A breeding scrotal shape and circumfer-
produce good quality semen the 3+ year old bulls had a soundness exam does not ence, assessed hooves for ab-
(Barth, 2000). Even if young 49.9% pregnancy rate. Year- cover a bull’s libido, but this scess, Interdigital fibromas
bulls have high quality ling bulls had an even larg- can be observed on your own (corns), corkscrew of the hoof
semen and have all the at- er number of mounts at 207 through watching the bull’s claw, and other conformation
tributes of a productive and and the lowest overall preg- behavior around cattle that issues in the legs and range
fertile herd sire, lack of ex- nancy rate of 30.9%. This are in standing heat. of motion. Body Condition
perience could be another shows that with age, bulls The cardinal principles of Score is taken, and sheath
determining factor in how will achieve more pregnant breeding soundness are: and eyes are inspected.
many or how few females he females with reduced effort •Physical Soundness Semen can be collected by
is able to breed. compared to younger and •Reproductive soundness a veterinarian and looked at
Mature bulls should be under a microscope to look
able to service cows at a at concentration of sperm
ratio of 1:25-1:30 easily if he cells, and mobility of the
fits all the criteria in a BSE. sperm cells. Morphology of
Smaller pastures during the sperm cells and overall
breeding season may help volume is also considered
the bull get every female in determining if a bull can
bred more easily. Be pre- provide high quality semen.
pared for your bull to lose Mature bulls that have a
a considerable amount of
condition during breeding continued on page 19

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registering prior to the sale

Program Requirements:
 Heifers have met minimum standards for reproductive soundness, pelvic size, body condition and
weight and are free of blemishes. Join Us on Facebook
 Heifers are bred to bulls meeting strict calving ease EPD requirements.
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Heifers are tested and found negative for BVD-PI.
 Heifers will calve from late August to November 30 and were preg checked within 30 days of the sale.
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Missouri Department of Agriculture.