40 Million cells or multiple straws/breedings

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SPH
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Re: 40 Million cells or multiple straws/breedings

Postby SPH » Mon Jun 19, 2017 9:32 am

Stocker Steve wrote:
Jeanne - Simme Valley wrote:if you don't want late calves, why not pull the bull on last calving date that works for you?

Higher cull value


That is exactly why. We usually pull the bull a little sooner than we did last year. We don't like calving in May but usually leave the bull out till about a May15-20th at the latest calving date. If we have to reduce the number of females a late calving bred cow is going to bring you more than an open cow because someone out there will be OK with calving her later. One of our bull buyers doesn't even turn his bulls out till July 1 and I know there are some guys that won't even start calving till late April or May because they don't want to mess with calving the same time they are in the field planting or deal with the snow and mud in March or earlier.

This cow in particular we didn't see the bull breed her so all we had was the vet's estimate on palpation at preg checking last fall which he had her at least a month earlier but obviously was wrong on his estimation. We've had cows in the past calve in early May that have breed back to calve as early as late March the following year so she will be given a chance to breed back up.
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Re: 40 Million cells or multiple straws/breedings

Postby cow pollinater » Mon Jun 19, 2017 4:15 pm

Air gator wrote:What would be the most effective strategy? You have a heifer that has missed on A.I. and the season is getting late.
What would work better? Breeding her with 40 million cell straws or inseminating her with 2 straws (with normal number of cells) or breeding her twice (and at what intervals?).

I'd breed twice. Once a couple hours into standing heat and again twelve hours after, given these options. "double charged" straws are just a sales pitch and should send you running because they usually happen in response to fertility problems.
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Re: 40 Million cells or multiple straws/breedings

Postby Air gator » Mon Jun 19, 2017 8:46 pm

Thanks, Cow Pollinator...I was waiting to hear what you thought. A friend was also telling me that bulls with really high SC can also have problems with their semen. What is your experience with HP epds? Thanks.
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Re: 40 Million cells or multiple straws/breedings

Postby cow pollinater » Mon Jun 19, 2017 9:06 pm

Air gator wrote:Thanks, Cow Pollinator...I was waiting to hear what you thought. A friend was also telling me that bulls with really high SC can also have problems with their semen. What is your experience with HP epds? Thanks.

The high SC deal is a new one on me. I've never payed attention to that one so there might be something there but I've never seen anything that made me link the two. I'm not on the production side, I just know what I see on the user side of things and what I do hear from people on the production side.
On HP, EPD's, I don't pay a whole lot of attention unless I see extremes either way. Better is always better but I don't believe it unless I know the pedigree has it on both sides or it's high accuracy. I don't believe there is a link between it and SC.
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