• Productivity


The Stockman has landed! Crooked Post Stockman 4Z, our new impact sire, is here.

Six months in the making, and finally the semen has arrived in South Africa for our autumn 2017 joining. We did some serious research to find the best genetics for our operation, and Stockman 4Z more than fits the bill. 

From Kirk Seaborn’s world-renowned Crooked Post Shorthorns in west-central Alberta, Canada, come genetics from a programme that has always been focused on the development and promotion of Shorthorn genetics towards the commercial beef market. The herd is not for show – it is performance oriented, relying on staying ahead of the demands of breeders worldwide.

Says Kirk, “We have adopted the use of genomics for over 15 years, ultrasound scanning of all yearling male and female progeny for 16 years and whole herd performance recording since our inception; only about one or two other herds in North America have applied these management tools for as long and as persistently as Crooked Post over the last 20 years. Our main promotion is towards the production of breeding bulls for commercial clients. Their feedback to us has always been integral.

This is music to our ears as we continue to strictly performance measure our herd as well, together with a rigorous hand/ eye assessment for structural correctness and functionality attributes of all our animals. To remain ahead of the curve, Kirk continues, “Just in the last few days the very first Genomic Enhanced Expected Progeny Differences (GE EPD) have been released by International Genetic Solutions (IGS). Some of our sentinel animals have been issued these GE EPDs. Once I’ve provided the American Shorthorn Association with our last 2-3 years of Igenity Profiles we will be well underway in utilizing this next big step in performance documentation. Crooked Post has conducted more genomic identification than any other Shorthorn herd in Canada and possibly N. America. It is really time to take the next big step!” As a result of Crooked Post’s innovative programme, Stockman 4Z’s latest IGS EPD update finds him now to be a trait leader for CED (Calving Ease Direct) and also for $BMI (British Maternal Index).As you may be aware, we work very closely with Ian Walsh from the Falkirk Scientific Foundation based in New Zealand, who plays an integral role in our herd development and selection process. He is aligned with our vision to produce cattle that are functionally efficient. He helps us monitor and predict the trait ability of our animals to their maximum, and then to understand their constraints or exceptionable abilities. He studied the video and photographs of the Crooked Post Shorthorn Stud and made some observations that helped our decision-making process.  He reported that “Stockman 4Z appears to be medium framed with excellent depth particularly the shoulder and girth region.  His mobility suggests a correct structural configuration with a full but smooth and optimal shoulder formation.  Stockman 4Z’s muscularity is ideal with ample expression illustrated.  A well-balanced sire that deserves consideration for your stud as an improver.”  This is especially encouraging as Ian cautions that we should only introduce new genes from a proven impact sire after stringent consideration. With Ian’s kind of input, we are sure you will understand why the Falkirk System is so supportive for us as breeders.

To see the video footage of Stockman 4Z and his daughters, click this link https://www.youtube.com/watch?v=DNbnjcsBnpk    

Further to the above input, we evaluated Stockman 4Z based on his sire line genetics, his dam line, and his offspring already on the ground in Canada.

Starting with the sire line, Kirk noted how Stockman 4Z would work with our current genetics: “I strongly feel that Stockman 4Z would contribute very positively in your program and would complement the sires that you are utilizing.” We have looked at this issue closely, and it is important to note how the genetics dovetail to a bull we used from Canada a couple of years ago, namely Shadybrook Scotty 83K. We do believe that tightening up genetics no doubt increases consistency and predictability of the offspring – in line with the expectations of return commercial bull buyers who are either chasing consistency in their herds or trying to maximise hybrid vigour in a cross-breeding operation. (By the way, have you noticed how people talk about and pursue the maximisation of hybrid vigour in their programmes, but at the same time purchase composite or far from pure bulls to use in their programmes?)

Some other significant genetics which are included in Stockman 4Z’s pedigree include Byland Gold Spear and Waukaru Gold Mine.  These are also commercially oriented herds that to date we have been unable to get into South Africa.

On Stockman 4Z’s dam’s side, the Red Rose family is one of the key lines. Says Kirk, “It’s a key family here at Crooked Post. It’s been a great family to work with and one that we’ve made improvements to through the years. Stockman 4Z is a result of this work and for this reason why I suggest that he’s a step or two ahead.” This is evidenced through the dam’s outstanding performance figures below.

Crooked Post Red Rose SLU4U X-685402

Performance Profile:

  • BW:78lbs/35kgs. WW 205 day adj. 735lbs/333kgs  YW adj. 852lbs./ 387kgs.
  • Currently 8 years 8 months old, Frame Score 5.0
  • 7 calving seasons, 7 weaned calves
  • During her career she’s maintained an average calving interval of 359 days. 

EPD Profile: (Value/ Percentile Ranking within North American Population)

  • Calving Ease Direct: 10/10
  • BW: -0.2/15
  • WW: 64/15
  • YW: 74/20
  • Milk: 21/25
  • Calving Ease Maternal: 8/4
  • Carcass Weight: 12/40
  • REA: -0.01/30
  • Marb: 0.04/40
  • Fat: -0.04/30
  • $CEZ: 34.96/15
  • $BMI: 148.25/2
  • $F: 57.65/15 

Her performance figures are shown on the graph below. Besides being exceedingly well-balanced, her performance figures trend comfortably on the “More Favourable” side of the graph.

Progeny Weight Performance Averages

  • (3) Bulls  BW:87lbs/39.5kgs   WW 205 day adj.: 779lbs/353kg   YW adj.: 1177lbs/534kgs. These include 3 herdsires, one of which is Stockman 4Z. A second herdsire went into a purebred herd and another was the high seller at Cowman’s Advantage Bulls Sale this past spring at $8000 to a commercial breeder.
  • (4) Heifers  BW: 78lbs/35kgs   WW 205 day adj.: 663lbs/300kgs   YW adj.: 851lbs/386kgs.


Below are two of her daughters

Followed by other Red Rose Family females


Stockman 4Z Progeny

Stockman 4Z has been used heavily at Crooked Post for four breeding seasons already, and has quite a number of progeny on the ground. Ian Walsh also critically evaluated Stockman 4Z’s heifers and commented to us as follows: His group of heifers are uniform and mobile with desirable form to function in any environment.  The pelvic setting is well illustrated as an optimal birthing canal to cater for desirable birth weights to contribute to high survivability and productivity.  The general impression of all the females observed from this stud is desirable with the attributes as described for Stockman 4Z … Longevity and high productivity ooze from these animals.

There are several significant purebred and commercial herds around the world that are and will be using Stockman 4Z. After the evaluation and doing the sums (our rather insignificant ZAR does not go very far these days) we decided to purchase the semen and marketing rights for South Africa. We will use him extensively for a number of years to come, with the view that he will make another significant improvement to our herd – certainly in the same manner our previous “big buy”, Sprys All Gold D052, did for us.