By Scout Nelson
Russ Daly, a professor and SDSU Extension veterinarian, explains that transitioning a heifer calf into a productive member of the breeding herd requires careful management. Farmers must focus on nutrition, genetics, environment, and health. Disease problems can affect heifers at many stages, from early growth to pregnancy, calving, and rebreeding. Good health programs help protect long-term productivity in the herd.
One major health concern for young cattle is the Bovine Respiratory Disease Complex (BRDC). This disease may appear early in life and can create long-term problems. Studies show that calves affected by BRDC often have lower survival to first calving, weaker immune systems, and reduced performance later in life. Preventing BRDC starts early with proper vaccination. Vaccines for diseases such as Infectious Bovine Rhinotracheitis (IBR), Bovine Respiratory Syncytial Virus, Mannheimia hemolytica, and Histophilus somni should be given before weaning with boosters when needed. Farmers should also monitor calves closely for illness and practice good biosecurity to prevent disease spread.
Other common health issues include pinkeye and footrot. These diseases reduce weight gain, body condition, and mobility, which can affect fertility. Managing flies, maintaining clean environments, and providing quick treatment can help reduce these problems. Internal and external parasites also harm cattle health, so calves should be dewormed with effective treatments when coming off pasture.
A heifer’s ability to become pregnant depends on nutrition, hormones, genetics, and strong immunity. Infectious reproductive diseases such as IBR and Bovine Viral Diarrhea Virus (BVDV) can cause infertility or pregnancy loss. Vaccination programs, especially modified live vaccines given before breeding, help protect heifers and their pregnancies. Biosecurity steps, such as testing new animals for persistent BVDV infection, also help protect the herd.
Leptospirosis and Neospora infections can also affect fertility. Vaccines are available for leptospirosis, but no vaccine exists for Neospora, so blood testing heifers before selecting them as replacements can help reduce risk.
Healthy calves also depend on strong colostrum from the heifer after birth. Good nutrition and proper body condition help improve colostrum quality. Pre-calving vaccinations can increase protection against calf diarrhea diseases such as E. coli, rotavirus, and coronavirus.
First-calf heifers often struggle to breed again during the next season. Good body condition, careful calving management, and early treatment of infections or health problems can improve rebreeding success.
Overall, strong health management starting early in life helps ensure heifers become productive, long-lasting members of the breeding herd. Veterinarian guidance can help farmers create effective health programs and avoid costly problems.
FAQs
- Why is heifer health important for breeding herds?
Healthy heifers grow better, reproduce successfully, and remain productive cows in the herd.
- What disease commonly affects young cattle?
Bovine Respiratory Disease Complex is one of the most common and harmful diseases in calves.
- Why are vaccines important for heifers?
Vaccines protect heifers from infections that can reduce fertility and cause pregnancy loss.
- How do parasites affect heifer health?
Parasites weaken animals, reduce weight gain, and lower overall productivity.
- Why is colostrum important for calves?
Colostrum provides antibodies that protect newborn calves from early diseases.
Photo Credit: gettyimages-diane-kuhl
Categories: South Dakota, Livestock, Beef Cattle