Published in the Jameson Journal, May 2026
As lambing season progresses and creep feeding begins, it’s important to stay alert to the risk of Pulpy Kidney (Clostridium perfringens type C and D) – a condition that can cause sudden and significant losses if not managed correctly.
We had a case where a farmer lost some lambs shortly after introducing creep feed. On discussion, it became clear that the lambs had not been vaccinated for clostridial disease, making Pulpy Kidney the most likely cause, this was confirmed with a post mortem.
Why Does This Happen?
Pulpy Kidney is typically triggered by a sudden change in diet and excessive amounts of highly fermentable carbohydrates, particularly when lambs move onto:
- Creep feed
- Lush spring grass
- Or a combination of both
This sudden rise in starch intake encourages the rapid growth of naturally occurring gut bacteria (Clostridium perfringens), which produce a toxin that can lead to sudden death -often with little or no warning.
What Should You Look Out For?
One of the challenges with Pulpy Kidney is how quickly it strikes. In many cases, the first sign is simply finding a lamb dead. However, warning signs can include:
- Lambs recently introduced to creep feed
- Animals that are thriving and growing well, then suddenly lost
- Distended abdomens
- Recent changes in diet or grazing
- No clostridial vaccination in place
Often, it is the best-performing lambs that are most at risk, which is why your best lamb can suddenly be found dead.
High-risk scenarios to look out for:
- Introducing creep feed for the first time
- Moving lambs onto lush grass alongside creep
- Sudden or inconsistent changes in feeding
- Periods where lambs go hungry followed by gorging
- Lack of clostridial vaccination
Prevention: Protecting Lambs This Spring
The good news is that Pulpy Kidney is largely preventable with the right management:
Clostridial vaccination is essential where creep feeding is used. Options include:
- Ovivac® P
- Covexin®
- Bravoxin®
- Heptavac® P
Without vaccination, lambs are at significantly higher risk of sudden losses.
Gradual introduction of feed:
- Start with small amounts of creep feed
- Build intake steadily
- Avoid sudden increases in starch consumption
Consistency is key:
- Ensure lambs have regular access to feed
- Avoid fluctuations that lead to gorging – running out of feed
Key Takeaway: Act Now to Reduce Losses
Pulpy Kidney remains a risk in creep-fed lambs, particularly where vaccination has not been carried out.
With cases already being seen this spring, now is the time to ensure you are aware, prepared, and protected – helping to avoid unnecessary losses at a critical time of year.
We can assist you in selecting the right products. Call 01765 689666 for advice on Pulpy Kidney Risk.
