Why clostridial disease prevention matters

Protecting lamb health is essential for maintaining a productive flock. One of the most important areas of sheep health management is preventing clostridial diseases — fast-moving illnesses caused by Clostridium bacteria that can lead to severe illness or sudden death in otherwise healthy animals.

A well-planned vaccination programme is one of the most effective ways to reduce these risks, protect young lambs, and avoid preventable losses.

Understanding clostridial diseases

Clostridial diseases are caused by different species of Clostridium bacteria, which are commonly found in soil and in the gastrointestinal tract of sheep. Under certain conditions, these bacteria can multiply rapidly and release toxins that cause severe illness or sudden death.

Common clostridial diseases affecting sheep include:

Enterotoxemia Type C

Also known as haemorrhagic enteritis or “bloody scours,” this disease affects young lambs and causes severe damage to the small intestine. It is often linked to digestive upset and can be triggered by sudden dietary changes.

Enterotoxemia Type D

Often referred to as “overeating disease” or “pulpy kidney,” this condition typically affects fast-growing lambs, particularly those on high-energy diets or nursing from high milk-producing ewes.

Tetanus (Lockjaw)

Caused by Clostridium tetani, tetanus is usually associated with wounds, including those caused by routine procedures such as docking or castration. It leads to muscle stiffness and is often fatal if left untreated.

The importance of vaccination

Vaccination is a key part of protecting sheep against clostridial disease. When ewes are vaccinated at the right time, immunity is passed to lambs through colostrum, helping protect them during their most vulnerable early stages.

Maintaining a consistent flock vaccination programme helps reduce disease pressure, improve resilience, and support long-term flock productivity.

Recommended vaccination protocol

For breeding ewes

Primary course: Administer two initial doses, typically spaced 4–6 weeks apart.

Booster vaccination: Give a booster at the appropriate time before lambing to maintain strong antibody levels in colostrum and support passive protection in newborn lambs.

For lambs

Lambs from vaccinated ewes: These lambs receive early protection through colostrum. Begin their vaccination course from around 6–10 weeks of age, with two doses given 3–4 weeks apart.

Lambs from unvaccinated ewes or with poor colostrum intake: These lambs are at higher risk. A tetanus antitoxin may be administered shortly after birth, particularly before procedures such as docking or castration. Vaccination may need to begin earlier, based on veterinary advice.

Best practices for vaccination

Good vaccination technique and strong record keeping are just as important as the product itself. Following best practice helps ensure the programme works effectively across the flock.

• Store and handle vaccines correctly to maintain effectiveness
• Use clean needles and inject in the correct site, typically subcutaneously in the neck
• Follow dose timing carefully to maintain protection
• Keep accurate records of products used and dates given
• Review your flock plan regularly with your vet

Why a proactive approach pays off

Clostridial diseases can progress rapidly and often give very little warning. A proactive approach to vaccination, backed by good flock management and accurate records, can make a major difference to health outcomes and flock performance.

Working with your vet to build a vaccination plan that suits your flock, system, and local disease risks will help you stay ahead of problems rather than reacting to them.

Using Herdwatch for smarter flock management

Keeping on top of vaccinations across a flock can be difficult, especially when there are multiple treatments, booster timings, and animals to monitor. Herdwatch makes it easier to stay organised and keep every record in one place.

Log treatments in real time

Record vaccinations and other treatments as they happen, helping improve accuracy and reduce missed entries.

Set reminders for boosters

Stay on top of follow-up doses and key treatment dates with reminders that help keep your flock on schedule.

Track each animal’s health history

Keep a clear record of what each animal has received, supporting better decision-making and easier compliance.

Keep flock records organised

By keeping vaccinations, treatments, and animal history together in one place, Herdwatch helps you make informed decisions that support the long-term health and productivity of your flock.