Few seasons on the ranch inspire more optimism than calving time. With calf prices at historic highs, every live and healthy calf represents not just an animal, but a major financial asset. Whether a rancher sells calves at weaning, retains ownership or develops replacement heifers, the message is the same. A live calf on the ground is worth more than it has been in years. Producers who dedicate time and attention to newborn calf health aren’t just protecting that investment; they’re laying the foundation for a calf’s entire lifetime of performance.
Most producers don’t realize that one of the most important steps in an effective calf health protocol happens in utero. Mother Nature has an amazing way of recognizing that life outside the womb is a drastic change for the calf, and that it needs to be prepared as much as possible before calving. For the last 60 to 90 days precalving, the cow’s nutrient requirements begin ticking up. This need is not only to support the rapid fetal growth of the last trimester but to partition the nutrients she consumes to her fetal calf. The cow’s milk isn’t a great source of vitamins and trace minerals, so the calf needs to be born with plenty of stored reserves. Colostrum production starts about 30 days prepartum as well. And we all know how critical high-quality colostrum can be to long-term health and performance. Effective vitamin and mineral supplements are crucial here, especially when they help with forage utilization and protein synthesis. You’re feeding for two, remember?
Speaking of colostrum, adaptation to life outside the womb starts with good-quality colostrum. A newborn calf is born like a monogastric, and its gut is very porous, like a sponge. This allows for maximum absorption of immunoglobulins (antibodies) from Mom’s colostrum. Hence, it’s important that colostrum intake takes precedence over everything else, and calves need to receive this immune protection as soon as possible. Calves born to well-nourished mothers have greater vigor and can get up and receive colostrum more effectively. If a calf is born with the proper nutrient reserves and receives good-quality colostrum at the perfect time, there’s a far higher likelihood that it will develop passive immunity.
Passive immunity only lasts for so long, as antibody levels degrade over time. A “high-risk” period of calf health typically exists when the transfer of antibodies from the dam declines faster than the calf’s immune system can fully develop. Usually, this high-risk period occurs just days after the calf is born. Our goal is to accelerate the development of the calf’s immune system, while “shielding” it from any pathogens trying to enter.
There are several options for producers. Some choose to vaccinate or use antiviral nasal sprays, but newborn calf pastes containing bovine-derived antibodies that add a layer of protection to the calf are growing in popularity. Make sure to closely read what these products include because you want to offer broad-spectrum coverage against viruses like E. coli, clostridium A/C/D and others. Some immunity-boosting gels provide these antibodies in combination with prebiotics. It’s a one-two punch when you provide specific antibodies and deliver a gut-enhancing technology. The gut is not only responsible for feed utilization and efficiency but is also home to 70% of the immune system. It is the only barrier we have between what calves put in their mouths and what enters the bloodstream. Just like defending the princess in the castle, we must build the army and strengthen the wall to ensure protection of our assets.
A heifer that gets off to a poor nutritional start may lag behind her contemporaries through weaning, puberty and first calving. Conversely, calves that begin life with strong immunity and a healthy gut often achieve higher average daily gain (ADG), fewer treatments during the growing phase and improved overall performance in developing or finishing programs. The first 24 hours after birth are an opportunity window that directly influences survivability, immunity, growth and lifetime production potential. Healthy calves don’t happen by accident. They are the result of a commitment to paying attention to your herd’s nutrition and to adapting the right technologies to get a calf off to a sure start.
