Once the majority of the herd has calved, farm attention naturally shifts to the milking herd, calf rearing, and preparations for mating. Unfortunately, late-calving cows can sometimes be overlooked.
These cows are often managing on smaller paddocks, acting as the "clean-up crew," and can be more difficult to supplement with pre-calving minerals than the main mob. As a result, they may face additional health challenges that can impact productivity, animal welfare, and reproductive performance.
One of the biggest risks for late calvers is becoming over-conditioned during their longer dry period.
Ideally, cows should calve at a Body Condition Score (BCS) of 5. However, when cows reach BCS 6 or higher, they become more susceptible to:
Both clinical and subclinical metabolic disease can have significant impacts on health and fertility heading into mating.
Late calvers can also experience a disproportionate number of calving complications. This is often due to a combination of over-conditioning and less frequent observation compared to the main calving mob.
Unfortunately, this can result in difficult calvings or missed problems that become much bigger issues later.
Avoid allowing cows to become too fat before calving.
Managing body condition is one of the most effective ways to reduce the risk of calving and metabolic problems.
If dry cows are consistently cleaning up their feed breaks, consider providing additional fibre.
Offer:
This helps maintain:
Even when magnesium chloride is being supplied through drinking water, additional magnesium supplementation can benefit late calvers.
Options include:
Magnesium plays a critical role in helping cows mobilise blood calcium around calving and reducing the risk of milk fever.
Trace minerals and vitamins D and E are essential for immune function, metabolism, and a successful transition into lactation.
Supplementation can be challenging when late-calving cows are located away from the milking platform.
In these situations:
Late calvers deserve the same level of observation as early-calving cows.
If calving has not progressed within a couple of hours:
Early intervention can prevent serious problems and improve outcomes for both cow and calf.
At the same time, assess the udder for signs of heat, swelling, or inflammation. Only strip a quarter before calving if there are other indicators of mastitis.
Every late-calving cow should receive a calcium bolus at calving.
This is one of the simplest and most effective preventative tools available for reducing the risk of milk fever and supporting a smooth transition into lactation.
Late-calving cows are often a small group, but they can create disproportionately large problems if they don't receive the same attention as the rest of the herd.
By managing body condition, providing appropriate mineral supplementation, monitoring calving carefully, and proactively preventing metabolic disease, you can improve cow health, fertility, and performance heading into mating.
If you'd like advice on transition cow management, mineral supplementation, or calving support, contact your local Vetora production animal team.
