Planning Your Breeding Program: A 12-Month Calendar for Better Lambing Results

For sheep producers, successful lambing doesn't begin when lambs hit the ground—it begins months earlier with careful planning. A well-structured breeding program ensures your flock remains productive, profitable, and resilient year after year. Whether your goal is producing replacement ewes or prime lambs, focusing on high fertility sheep is one of the most effective ways to improve overall flock performance.

At ProBreed, we believe that consistent genetic improvement combined with strategic flock management delivers long-term success. Our breeding philosophy focuses on maternal efficiency, fertility, lamb survival and growth to help producers achieve more kilograms of lamb per hectare while reducing labour and production costs.

Below is a practical 12-month breeding calendar that can help producers prepare for better conception rates, healthier ewes and stronger lamb crops.

Months 1–2: Review Last Season's Performance

Every successful breeding program starts with evaluating the previous season.

Review key performance indicators such as:

· Scanning percentages

· Lamb survival rates

· Weaning percentages

· Average weaning weights

· Ewe condition scores

· Ram performance

These figures identify strengths and weaknesses before the next joining period begins. Producers using performance records are better equipped to make informed breeding decisions rather than relying solely on visual assessment.

Months 2–3: Define Your Breeding Objectives

Not every flock has the same priorities.

Ask yourself:

· Do you want more lambs weaned?

· Is wool production equally important?

· Are you targeting heavier carcasses?

· Do you need more replacement females?

Your breeding objectives determine which genetics will deliver the greatest return.

For many Australian producers, selecting high fertility sheep means focusing on genetics that consistently deliver twins, excellent mothering ability and strong lamb survival.

Months 3–4: Select the Right Rams

Ram selection has the biggest influence on future flock performance because each ram contributes genetics to many offspring.

Look beyond appearance and consider:

· Fertility

· Maternal traits

· Growth rates

· Birth weight

· Weaning weight

· Structural soundness

· Australian Sheep Breeding Values (ASBVs)

At ProBreed, every breeding decision is backed by measured performance data to maximise genetic gain while improving fertility and maternal efficiency.

Months 4–5: Prepare Your Ewes

Even superior genetics require healthy ewes.

Before joining:

· Assess body condition scores

· Vaccinate where required

· Complete parasite management

· Address mineral deficiencies

· Ensure adequate nutrition

Target condition scores improve ovulation rates, conception rates and embryo survival.

Nutrition during this period has a direct influence on reproductive performance.

Month 6: Joining

Joining is where months of preparation come together.

Best practice includes:

· Joining healthy rams only

· Monitoring ram-to-ewe ratios

· Recording joining dates

· Maintaining consistent nutrition

· Minimising unnecessary stress

Good management during joining helps maximise conception rates and ensures a tighter lambing period.

Months 7–8: Pregnancy Scanning

Pregnancy scanning provides valuable information for flock management.

Scanning identifies:

· Dry ewes

· Singles

· Twins

· Triplets

Grouping ewes according to litter size allows producers to feed animals according to nutritional demand, improving lamb survival while avoiding unnecessary feed costs.

High fertility sheep often produce multiple lambs, making pregnancy scanning an essential management tool.

Months 8–9: Nutrition During Pregnancy

Late pregnancy is one of the most critical periods in the production cycle.

Energy requirements increase significantly, particularly for twin- and triplet-bearing ewes.

Proper nutrition supports:

· Lamb birth weights

· Colostrum production

· Milk supply

· Lamb survival

· Ewe recovery after lambing

Poor nutrition during this stage can reduce the benefits gained through superior genetics.

Months 9–10: Prepare for Lambing

Before lambing begins:

· Check paddock shelter

· Ensure adequate feed availability

· Prepare lambing paddocks

· Minimise disturbance

· Monitor weather conditions

Reducing stress during lambing allows ewes to display stronger maternal instincts and improves bonding with newborn lambs.

Genetics also play a major role. ProBreed Maternal sires are selected for high maternal efficiency, fertility and lamb survival, helping producers wean more lambs each season.

Months 10–11: Lambing Management

During lambing:

· Observe from a distance where possible.

· Record losses.

· Identify any difficult births.

· Monitor ewe mothering behaviour.

· Check lamb vigour.

The objective is not simply more lambs born, but more lambs successfully weaned.

This is where selecting high fertility sheep with excellent maternal traits delivers measurable commercial benefits.

Month 12: Weaning and Data Collection

Weaning is more than separating lambs.

It is an opportunity to gather valuable information that improves next year's breeding program.