Theres more than one way to breed a cow.

… and on the Diamond H we use AI.  On a prior post, I discussed why we AI heifers one month before our cows.  We AI’d our Fall Cows on Dec 3rd to calve in mid September.    We use a three shot protocol to synchronize the cows.  First shot is Estradiol/Progesterone to inhibit any imminent heats.  One week later we give lutalyse to trigger the heat.  The next day we give a Estradiol  shot to tighten up the window.  The books tell you to breed by time, 30 hours after the last shot.  We use heat detection patches and breed 12 hours after standing heat.  We have enjoyed a 80% conception rate over the last 5 years.  Environmental conditions such as radical weather changes (common in these parts) can affect your results.

Click to enlarge

John breeding the next great crop of calves.

We AI all our females for several reasons.  First, and I believe foremost, you can bring the best genetics available in your breed to your ranch for a small investment.  I am also able to study the strengths and weaknesses of a bull and match appropriately with my cow.  While not a sure thing, it increases your frequency of a good result.  Therefore, you can launch the genetics of your program at a much greater rate.

I am pleased to say, if the AI misses, We will most probably like the result!  Oscar and Juan Pablo are currently working on our heifers, Ranger and Twin Eagle.

Twin Eagle....Fertility and Muscle

A linebred Northstar Vernon son

3W Lonestar Vernon

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The Diamond H Heifer Breeding Program

The heifer breeding program on the Diamond H. (part 1)


This one's for sale, will be AI'd to Riss Fabian

he time is upon us to breed the fall heifers.  Breeding is my second favorite time on the ranch….calving is of course the coup de gras! All heifers are bred one month before cows.  That allows them to have a little more time to recover from the stress of birth and mother hood to give them a better shot at being bred back as a “sophomore” and to assimilate into our

Hari Daughters are maternal with lots of performance.

program with their older peers.   We breed the majority of our heifers as one year olds. Therefore, when it is time to breed back they are at a very difficult time of life.  The’re losing their teeth making it uncomfortable and more difficult to eat.  Add to that the fact that their calf is taking the valuable nutrition they still need to make the transition to a mature cow, you get the result that the sophomore is the most difficult animal on the ranch to breed.  We give them the very best nutrition we can to give them the best chance to stay in the program.  Part two of this installment is coming soon.

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