With calf prices sitting around $4 per pound, there has never been a better time for beef producers to prioritize reproductive performance. As Ted Perry, beef cattle technical services with Purina Animal Nutrition, points out, every missed heat cycle isn’t just a lost pregnancy, it’s 50 lb. of lost calf growth.
“When you look at the profitability of cow-calf operations in previous years, if we could make $100 per cow per year, that was a big deal,” Perry says. “Now with these prices, we could potentially lose $200 per heat cycle.”
That kind of economic pressure has many veterinarians and producers re-examining how to tighten up breeding windows, improve conception rates and, ultimately, get more calves on the ground early in the calving season. Even small improvements in conception rates or tighter breeding windows add up quickly across a herd. Shifting just a few calves earlier in the calving window can offset the cost of nutritional interventions many times over.
Why Energy Balance Matters
The foundation of reproductive success in beef cows is energy balance. Cows that enter the breeding season in poor condition often take longer to return to estrus, reducing the likelihood they’ll conceive in the desired breeding window. Negative energy balance is common after calving, particularly in young cows still growing themselves. This can result in delayed estrus, weak heat expression and lower conception rates. Perry emphasizes managing body condition score (BCS) is non-negotiable.
“Make sure the cows are pushing that BCS of 6, and make sure the bulls are pushing that,” he says.
Energy status influences not only whether a cow cycles, but also egg quality and embryo survival. Research consistently shows cows with adequate energy reserves at breeding conceive earlier, stay pregnant more consistently and wean heavier calves. Simply put, managing energy status sets the stage for reproductive success.
Research on Energy Support
Purina has been evaluating nutritional strategies to support reproductive performance under today’s market conditions.
In a two-year study involving 164 beef cows, animals fed a new technology, CX8, beginning 30 days prior to breeding through 90 days after showed higher first service conception rates from artificial insemination compared to controls, with results improving in the second year.
The mechanism?
“There are multiple additives, such as yeast, to support rumen health, increased levels of trace minerals and phytogenic compounds providing antioxidant properties to support performance,” Perry explains. “However, with multiple components, you can override the system. You can end up with the two components canceling each other out. That’s been a huge part of our research: making sure that everything we use is complementary — one plus one should equal two and a half.”
The approach also accounts for rumen efficiency. By balancing rumen function with the right mineral and additive support, cows can extract more energy from their diets, channeling that into reproductive success.
At the same time, bulls also need careful nutritional management. Perry says semen production depends heavily on BCS.
“If [bulls] are too thin, they’re not going to produce enough semen … [If] we get them too fat during the rest period, then we put them out and they’re running and chasing everybody to get bred. What happens to their body condition? They’re dropping. They’re in starvation mode. They’re not going to produce semen,” he says.
Because semen maturation takes about 60 days, Perry recommends ensuring bulls are at BCS 6 approximately 120 days before turnout — essentially by Christmas if breeding starts in May.
Another area of interest is early embryonic loss. While the work is ongoing, Perry notes artificial insemination and embryonic transfer practitioners are reporting potentially lower rates of early embryo death in herds receiving nutritional support during breeding, potentially boosting conception success even further.
Build the Foundation
Still, Perry cautions no supplement can fix a fundamentally weak nutrition program.
“You’ve got to have the building blocks in place to start with,” he says.
Veterinarians and producers can work together on these building blocks to improve reproductive outcomes in a number of ways:
- Monitor and manage BCS. Aim for cows to calve at a BCS of 5 to 6. Cows in this range are more likely to cycle and conceive on schedule.
- Make a nutrition plan. Design mineral and feeding programs that balance energy needs with reproductive goals.
- Prioritize young and thin cows. These groups are most vulnerable to energy shortfalls and reproductive delays.
- Align nutrition with breeding seasons. Matching feed quality and supplementation to peak demand periods pays dividends in conception rates.
Once these fundamentals are in place, advanced nutritional strategies — whether CX8 Additive Technology or similar products — can provide an extra push in conception rates.
Takeaways
For veterinarians, the message is clear: reproduction is both a biological and an economic conversation. Helping producers link nutrition and reproduction not only improves herd health, but also directly impacts profitability.
For producers, today’s calf market represents both an opportunity and a challenge. As Perry puts it, with calf prices so high “now is the time that you find out what works at your ranch.”
