Early Heifer Maturity ?

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Texas Gal
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Re: Early Heifer Maturity ?

Postby Texas Gal » Thu Oct 11, 2018 10:33 am

Coosh71 wrote:We run some Gelbvieh over Angus/Angus Hereford and Char cross cows. We have seen some not all, heifers start cycling at 7+ months. We do not breed at that age, but they are cycling. By 12-13 months our heifers are 750+ and we have no reservations putting our LBW RA bull on them. We do synch them to try to tighten the calving window. Last year we put a bull on 20 heifers at 12-14 months old and got 100% bred in 60 days. We like the Gelbvieh influence on our heifers fertility so far. This year we will do the same with 18-20 heifers that we like.


I've a group of 8 -9 month old super baldie heifers who are cycling regularly now. It's playing be nice on my grazing rotation since i don't want them near any bulls yet. We're trying to hold off until they're 13-14 months to breed. It appears my cattle did better through the droughty summer than I expected them to. :shock:
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Re: Early Heifer Maturity ?

Postby Bright Raven » Thu Oct 11, 2018 10:44 am

T & B farms wrote:Maybe I’m just picky, but I won’t keep anything under 160 square cm.


The lowest score I have gotten is 162. That was at 12 month score. I have had as high as 222.7.

I think 160 is the minimum I would want on my farm with the birthweights I get. In fact, I want about 180.
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Ky hills
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Re: Early Heifer Maturity ?

Postby Ky hills » Thu Oct 11, 2018 12:22 pm

I have always thought of 14-15 months being the ideal breeding age, regardless of when they start cycling. However have calved out several younger with not much problem at all. I like for our Angus/Hereford heifers to be at the very least 700 lbs and preferably 750-800 at breeding time. We have our heifers pelvic measured and the sale that we participate in has a requirement of 150 cm at yearling. Typically our calves are from 12-15 months at that time and usually anywhere from 1 to 5 out of 35 or so won't pass that. That is usually the younger or thinner calves but not always. I would say that on average most of ours will go 180 or better several usually measure over 200. We use low birthweight Angus bulls for our sale heifers, and most of what I retain as well. Have used a moderate Hereford bull on Hereford Heifers with no problems, but prefer to use Angus bulls on Angus or crossbred heifers.
On an average year we usually have some of our heifer calves cycling as early as 5 months, and have been getting them weaned by that time if the bulls are still with the cows. Used to let our Charolais calves stay on the cows for 7-8 months, with none getting bred early, then started using different bulls and some heifers were cycling by or before 7 months so started weaning them sooner. With Angus, or Hereford bulls our heifers will sometimes start cycling at 5 months.
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Re: Early Heifer Maturity ?

Postby 76 Bar » Thu Oct 11, 2018 1:50 pm

Correct me if I'm wrong but I believe 160 square cm. was traditionally the minimum acceptable PM for yrlg bulls and heifers and sans an extreme regarding height versus width ratio.
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Re: Early Heifer Maturity ?

Postby Bright Raven » Thu Oct 11, 2018 2:02 pm

Bright Raven wrote:
All my heifers get a birth canal measurement at 12 months. I sell bred heifers under the Kentucky CAIP program and a Certified pelvic minimum score of I think 130 square centimeters is required.


I checked the criteria for approval of funding for heifers under The Kentucky CAIP (Cost Share Program). It is as follows:

All heifers must have a 12 month pelvic score of 150 square centimeters or greater and/or a 18 month score of 180 square centimeters or greater.
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Re: Early Heifer Maturity ?

Postby TCRanch » Thu Oct 11, 2018 2:28 pm

Bright Raven wrote:
T & B farms wrote:Maybe I’m just picky, but I won’t keep anything under 160 square cm.


The lowest score I have gotten is 162. That was at 12 month score. I have had as high as 222.7.

I think 160 is the minimum I would want on my farm with the birthweights I get. In fact, I want about 180.

150 is my minimum but they're measured at 11 months when they get their BANGS & I use a pretty low BW/high CED bull.
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