
Are the Numbers Growing & What’s the Right Development Program?
The beef cow herd number in the U.S. has been on a steady downward trend since the peak of the last defined cattle cycle (mid 1990s). In Canada, the number has been an even steeper decline. Some would suggest that the cattle cycle is broken, looks different or is simply not well defined today. Record values of essentially every class of animal in the beef industry, coupled with low inventory and supplies, is leading to an outcry by many analysts and experts for herd expansion. Well, these calls are likely being heard to some extent as there is evidence of more replacement females being retained.
The USDA January 1 Cattle Inventory Report cites replacement heifer numbers up one percent to 5.2 million head. The report listed several states where the largest increase may be occurring, primarily in the Northern Plains and some Rocky Mountain states. This would probably makes sense given the drought in the Southern Plains, however that could change now as improved moisture conditions are returning to some drought stricken areas. I have also had lots of recent discussions with cattle producers and traders that would anecdotally support more replacements being held over.
Replacement heifers do get bred (or at least that’s the intent) and a lot of good research has been done on how to best achieve this. After all, the heifer is the beginning of a very large investment that takes a few years to fully achieve and win back a just reward. If indeed a lot of heifers are being held back due to price and demand, there may be more than average that don’t, or will not, measure up. If you are purchasing, select what fits you and take time to evaluate.
What Should They Weigh and When Do They Need to Be Bred?
One common benchmark in developing heifers is to have them reach a target weight of 65 percent of mature body weight by breeding and 85 percent of mature weight by calving. It’s also understood (or not) that mature weights of cows are getting larger. So, with the above benchmarks, today 65 percent of a 1400 lb cow is a 910 lb breeding heifer. Sounds pretty big doesn’t it?
Develop Heifers Under Similar Conditions They Will Experience Throughout Life
Puberty is more a function of size versus age in beef cattle, but can it be reached too aggressively? It’s relatively easy to feed healthy heifers into breeding or achieve the desired weight, but feed costs may be prohibitive in today’s $6.00+ corn reality. More recent studies have shown that targeting 50-60 percent of mature body weight may wind up in selecting a more fertile heifer long term and for less cost to develop. The breeding percentage on these replacement heifers may not be as high, but selling an open yearling heifer for the feedlot is more profitable than selling an open two-year-old cow. And those heifers that do breed are likely to be more efficient lifetime breeders. In the end, the second calf, or the second conception on a cow, is probably more important than achieving the first. A costly scenario is one where a not so efficient heifer was fed well or was perhaps over-conditioned, did breed, and then failed to rebreed the next season because she’s then treated like a cow and fed more like the rest of the herd. In addition, over-conditioned animals may have more dystocia at calving.
Feeding and supplement strategies for the above scenarios do support utilizing self-fed supplements such as Crystalyx® with moderate to low quality forages and in good forage grazing systems. It also supports the use of Ionophores such as Bovatec® or Rumensin® to improve feed efficiency and growth. Overall, we still need a breeding heifer that is in adequate body condition (six would be ideal) prior to breeding.
None of the above takes away the need for matching the type of genetics to the environment and the goals of the individual operation. Conducting breeding soundness exams for replacement heifers 1-3 months ahead of the breeding season is also a good practice in determining fertility, pelvic scores, body conformation, etc.
With today’s market and demand, there appears to be more interest in retaining more replacement heifers. This will provide opportunity for those buying, selling and developing heifers. Choose heifers that fit your program the best and follow through with nutrition programs that support cost efficient growth and reproduction.