Most discussions around calf loss begin at calving. But by then, much of the outcome has already been set in motion.
Across veterinary perspectives from different production environments, a consistent picture emerges. Calf outcomes are shaped over time, influenced by a series of decisions and conditions that build on one another.
It is important to note these patterns may look different depending on region — whether driven by cold stress, heat, drought or mud. The underlying process, however, remains consistent across systems.
Before Birth: Build Resilience Early
Calf outcomes begin to take shape during gestation. Nutrition, stress and overall maternal management all contribute to how the calf develops before it is ever born.
“Poor nutrition of the cow is a stress on the fetus … any stress on the cow can affect the development of the placenta and also of the calf,” says Dr. Katie Waine, veterinary pathologist at the University of Calgary. “Maternal stress around breeding and pregnancy can also have much longer-term effects on calf health, production and reproductive performance way off into the future.”
This concept, known as fetal programming, highlights how early conditions influence organ development, immune function and long-term performance. Calves may appear normal at birth while still benefiting from stronger developmental foundations established during gestation.
Key risk factors before birth include:
- Inadequate maternal nutrition or poor body condition
- Environmental or physiological stress during gestation
- Inconsistent feed quality
- Health challenges
- Gaps in vaccination or biosecurity planning
Nutritional management during gestation plays a central role in setting the foundation for calf health. Cows entering calving in appropriate body condition are better positioned to support both fetal growth and colostrum quality. Reducing stress during pregnancy further supports placental function and fetal development. Consistent feed quality, stable environments and proactive health management all contribute to a stronger starting point for the calf.
At Birth: Support a Strong Transition
Calving represents a key opportunity to support the calf’s transition into early life. While it can reveal existing vulnerabilities, it also provides a chance to reinforce resilience.
“The effects of a difficult calving don’t stop at birth — they carry forward into immunity, vigor and overall survivability,” says Dr. Lisa Freeze, field veterinarian supervisor with the Government of New Brunswick.
A smooth calving process helps calves stand, nurse and absorb colostrum more effectively. Timely intervention when needed can prevent minor challenges from becoming larger setbacks.
“When calves are delayed during calving or we have to intervene late, they’re already starting life at a disadvantage,” Freeze says.
Key risk factors at birth include:
- Prolonged or difficult calving (dystocia)
- Delayed standing or nursing
- Inadequate or delayed colostrum intake
- Early-life stress or trauma
Focusing on calving ease, monitoring progress and ensuring early colostrum intake all support a stronger start. These early actions directly influence immune transfer and overall vigor.
“What we see with the sickness and death of calves all depends on how much pathogen they get exposed to and how resistant they are to it,” says Dr. Van Mitchell of Metzger Veterinary Services.
Supporting resistance through colostrum and minimizing early stress helps calves respond effectively to their environment.
After Birth: Manage Exposure and Reinforcing Success
After birth, management focuses on maintaining the balance between exposure and resistance. Even well-prepared calves benefit from environments that support their continued development.
In practical settings, multiple factors often interact. Recognizing these interactions allows producers to stay ahead of potential challenges.
“It’s rarely just one thing. A calf that struggles at birth, doesn’t get enough colostrum, and then is exposed to a challenging environment — those risks stack on top of each other,” says Dr. Allison Pylypjuk of Beausejour Animal Hospital.
Dr. Lauren Wilson of Peterborough Veterinary Services agrees: “Those calves that don’t receive adequate colostrum are much more susceptible to disease, and when you combine that with environmental exposure, that’s when we start to see problems like scours and pneumonia.”
The same principle applies in a positive direction. When calves receive timely colostrum, experience minimal stress at birth and are raised in clean environments, those advantages build as well.
Key risk factors after birth include:
- High pathogen load in calving or housing areas
- Overcrowding or poor stocking density
- Mixing age groups, especially older calves with newborns
- Delayed identification and isolation of sick animals
Clean calving areas, appropriate stocking density and thoughtful grouping strategies help limit pathogen exposure. These practices support calves as they continue to develop immunity and resilience.
“We can eliminate a lot of exposure to the pathogens by keeping our calving areas clean, keeping the sick animals away,” Mitchell says.
Managing these factors helps maintain momentum established earlier, allowing calves to continue on a positive trajectory.
A Proactive Approach to Calf Survival
Viewing calf outcomes as a cumulative process creates more opportunities for intervention. Each stage — before birth, at calving and after birth — offers a chance to support the calf’s success.
Rather than focusing only on problems after they appear, this approach emphasizes building resilience early and reinforcing it over time. The goal is not to eliminate all challenges, but to create conditions where calves are better prepared to respond. Consistent management, early attention and thoughtful decision-making all contribute to improved outcomes.
Calf survival is not determined in a single moment. It develops step by step, shaped by a series of actions that build on one another from gestation through early life.
