Sheep Care in Australia

Good sheep husbandry begins and ends with observation. The producer who walks their mob every morning with an attentive eye will consistently outperform one who checks occasionally or only investigates when something is obviously wrong. Sheep, like all prey animals, have a strong instinct to mask illness — an animal that is visibly and unmistakably unwell in a paddock is usually much sicker than it appears.

The morning check establishes your baseline for what is normal. Healthy sheep are alert, mobile, and responsive to your presence — they will move away as you approach, graze actively in the morning hours, and show bright, clear eyes. Any sheep that fails to move with the mob when you walk through, that is standing with its head down and ears drooped, that is grinding its teeth, or that carries one leg higher than the others, requires closer attention. Catch and assess it before you leave — a problem identified in the morning is a problem you have time to manage. One discovered at the end of the day has already progressed further than necessary.

Walk systematically rather than scanning from the gate. What looks like a settled, even mob from the gate may contain three animals with early-stage blowfly strike, a ewe showing early lameness, and a wether in the early stages of urinary obstruction — none of which are visible from fifty metres. Get into the mob, move slowly, and look at each animal. In large flocks this is not practical for every animal every day, but a systematic approach that covers the whole mob over two to three days will catch the vast majority of problems in their early stages.

Evening checks serve a complementary purpose. Count the mob against your records. A missing animal in sheep is nearly always one that is down somewhere in the paddock — cast (on its back and unable to right itself, a common and potentially fatal situation in heavy-fleeced Merinos on sloped ground), injured, or stuck in a fence. A ewe that has been cast for more than a few hours can die from bloat and circulatory compromise, so a missed count at last light that is followed up promptly saves lives. In large flocks, electronic RFID eartags and paddock readers make accurate counting practical in a way that was not possible a generation ago.

Keep a farm diary or digital record of your daily observations. Patterns that are invisible day-to-day become clear over weeks and months — a particular paddock that consistently triggers foot problems in wet weather, a family line that always struggles at weaning, a section of fence that regularly results in cast sheep. Systematic observation recorded consistently is the cheapest and most powerful management tool available to any sheep producer.

Low-stress handling is not merely an animal welfare aspiration — it is a practical productivity tool. Sheep that are regularly handled quietly, moved with calm pressure and release, and not subjected to unnecessary noise, dogs, or running produce better. Adrenaline released during a stressful mustering or drafting event suppresses immune function for hours afterward, reduces reproductive performance in ewes around joining, and causes measurable reductions in weight gain in finishing lambs. The difference between a well-handled and a poorly-handled mob over a season is significant and entirely within the producer's control.

Sheep respond to the flight zone — the bubble of space around an individual animal within which the animal feels pressure to move away from the handler. The size of the flight zone varies enormously between animals (a highly domesticated animal may have almost no flight zone; a wild-caught or poorly socialised animal may have a zone of twenty metres or more) and can be reduced over time through regular, gentle contact. Working just inside the flight zone creates forward movement; retreating out of the zone releases pressure and stops movement. This is the fundamental language of sheep handling and understanding it makes mustering and yarding far more effective with far less running and shouting.

Dogs are the primary working tool on most Australian sheep operations and the single biggest variable in whether a mob is handled well or badly. A well-trained, calm dog working at the right distance and speed is extraordinary. An over-keen dog working too close, gripping, or barking continuously causes more stress in a single mustering than weeks of quiet handling can recover. If you work dogs, invest in their training and understand their limitations. Know when to put the dog on the lead or in the ute and complete the work on foot.

Yard design directly determines the ease of handling. Curved races, solid-sided forcing yards, and correctly positioned gates and draft points reduce the physical effort and animal stress of every management task. The basic principles — reduce visual distractions, avoid shadows across the race entry, ensure even lighting, use the natural tendency of sheep to move toward other sheep and light — are well-established and well-documented. If your yards are consistently difficult to work and require large numbers of people or significant physical effort, the yards are the problem, not the sheep.

Weigh regularly. A set of electronic scales in the race, used consistently, provides data that is impossible to gather any other way. Body weight at joining, at pregnancy scanning, at lambing, at weaning, and at drafting for sale are the data points that allow objective management decisions rather than subjective visual assessments that vary between observers. The cost of a set of livestock scales is recovered in better targeting of supplementary feed within a single season on any medium-sized operation.

Shearing is the most significant annual event in most sheep enterprises and the one that requires the most coordination, preparation, and attention to animal welfare. In Merino and wool-producing operations, shearing timing affects fleece quality, reproductive management, and the welfare risk from weather events. Getting it right matters economically in ways that are easy to underestimate.

Shearing timing is determined by breed, enterprise type, and climate. Merinos in southern Australia are typically shorn once annually, with timing varying from late winter to late spring depending on the region — avoiding the coldest months while also avoiding the period immediately before or after joining in enterprises where that affects fleece break (a weakness in the staple caused by physiological stress that significantly reduces fleece value). Poll Dorsets, Dorpers, and other non-wool breeds kept primarily for meat production may not require regular shearing at all, or may be shorn primarily for welfare (crutching) rather than fibre production. Angoras are shorn twice yearly — typically August and February — to capture two full fleece growths.

Book your shearer six to twelve months in advance in most Australian regions. Good shearers are in consistent demand and have full books well ahead of the season. Establish a working relationship with a shearer who knows your flock, as a shearer familiar with your setup works faster and more carefully than one unfamiliar with your yards and animals. Confirm the booking with a reminder call six to eight weeks before the scheduled date.

Pre-shearing preparation matters for wool quality and shearer efficiency. Ensure animals are dry before entering the shed — wet sheep cannot be shorn and will be held over, disrupting the schedule. Hold animals off wet pasture and under cover overnight before shearing if rain is possible. Do not feed animals in the eight hours before shearing — a full rumen increases the risk of blowout (visible gut contamination of the fleece) and makes handling heavier and more physically demanding for the shearer. Ensure the shearing shed floor is swept clean, the wool table is set up, skirting tables are positioned, and bale packs and ties are ready.

Post-shearing management is where many losses occur. Freshly shorn sheep are highly vulnerable to cold weather exposure for three to four weeks after shearing — the insulating fleece is gone and the metabolic capacity to generate replacement body heat is significant but finite. A cold, wet southerly within days of shearing in southern Australia can kill significant numbers of animals, particularly if they are in poor condition, are recently weaned, or do not have access to adequate shelter. Watch the forecast closely around shearing dates. If cold conditions are predicted within a week of shearing, have a plan: a holding paddock with shelter, the ability to delay by a week, or an emergency feed program to boost the animals' thermogenic capacity. Freshly shorn animals should receive additional feed immediately post-shearing to support heat generation.

Crutching — removal of wool from around the hindquarters, tail, and inner thighs — is a welfare and production practice separate from full shearing. It reduces fly strike risk in the highest-risk areas of the body and keeps dags from accumulating, which reduces the moisture and odour that attract blowflies. Most wool sheep operations crutch two to four weeks before expected lambing (to improve the ewe's ability to clean and nurse lambs), and again in autumn before the high-risk fly period. Crutching is a practical skill most producers can learn to do themselves with a crutching handpiece, reducing dependence on contractors for this specific task.

Foot problems are the leading cause of lameness in Australian sheep and represent a significant welfare concern and production cost in affected flocks. The two main conditions — foot scald and foot rot — are distinct in cause and severity but both respond to prompt treatment and preventive management. Understanding the difference between them is the starting point for an effective foot health program.

Foot scald is caused by Fusobacterium necrophorum alone, without the involvement of the virulent strains of Dichelobacter nodosus that are necessary for true foot rot. It presents as reddening and moist inflammation of the skin between the claws (the interdigital skin), is painful but typically does not cause separation of the horn from the underlying tissue. It is associated with wet, muddy conditions and can spread rapidly through a mob when pastures are waterlogged. Most cases of foot scald respond to zinc sulphate footbathing (10% solution, minimum two to three minutes contact time) and, if persistent, to antibiotic treatment.

Foot rot is caused by the synergistic action of both F. necrophorum and virulent strains of D. nodosus. It is significantly more serious than foot scald — it causes progressive under-running (separation) of the hoof horn from the sensitive tissue beneath, produces the characteristic fetid (rotten) smell that distinguishes it from scald, and causes severe lameness that prevents normal grazing and results in rapid body condition loss. Virulent foot rot is notifiable in some Australian jurisdictions because it can establish permanently in a flock and is extremely difficult to eradicate once established.

Foot rot eradication programs, where justified, require: identifying and culling or isolating all clinically affected animals; paring affected hooves back to expose under-running tissue; footbathing the whole mob with zinc sulphate or formalin; antibiotic treatment of all clinically affected animals (oxytetracycline is the most widely used); and vaccination with Footvax. The program requires strict quarantine of incoming animals (foot rot enters flocks through introduced sheep) and consistent follow-through over multiple treatment events. It is labour-intensive and demands commitment over a full season to succeed, but the production gain from a flock free of virulent foot rot is substantial and permanent.

Footbathing is the primary preventive and early treatment tool for foot scald and mild foot rot in ongoing management. The standard solution is 10% zinc sulphate (dissolve 10kg of zinc sulphate crystals in 100 litres of water). The footbath needs adequate depth (minimum 100mm, preferably 150mm) and length (minimum 3 metres) to ensure adequate contact time as sheep walk through. Walk the mob through at a slow, steady pace — don't rush them. Change the solution when it becomes visibly contaminated with soil and manure, as diluted and contaminated solution is far less effective. Regular footbathing on a three to four-week schedule in wet conditions is far more effective than intermittent footbathing of already-lame animals.

Hoof trimming in sheep requires care not to be overly aggressive. Unlike goats, sheep hooves do not typically need the same frequency of trimming provided the animals are on adequately abrasive ground. On soft pastures or in irrigated situations, trimming every two to three months may be appropriate. Always pare toward the healthy tissue and stop when you see pink — cutting into the quick causes bleeding, pain, and opens the hoof to secondary bacterial infection. Disinfect trimming tools between animals when working through a mob with active foot rot to prevent mechanical transmission of the organism.

The quality and value of a wool clip is determined as much by management between shearings as by shearing technique and classing decisions. Vegetable matter (VM) contamination from seeds and burrs is the most significant quality issue for Australian wool, and its management is primarily a pasture and timing decision made months before the wool is shorn.

Avoid grazing wool sheep on pastures with high seedhead loads during the period when seeds are mature and detaching. Common offenders in Australian wool-growing districts include barley grass (Hordeum leporinum), three-cornered jack (Emex australis), spear grass, and doublegee. Barley grass in particular is a major VM contaminant and can render a Merino fleece commercially worthless in severe cases. Manage paddock selection carefully in the October to December period in temperate Australia — this is when most problematic seeds are dispersing. If paddocks with high VM risk must be grazed, use them for non-wool classes (wethers for slaughter, dry ewes before joining) rather than ewe mobs contributing to the main clip.

Dag management reduces fly risk and maintains wool hygiene. Dags (faecal staining accumulated around the breech) are a fly-strike risk and indicate digestive issues — typically scouring from internal parasites, sudden diet change, or high-protein pasture. Address the underlying cause of scouring first, then remove accumulated dags by crutching. Do not leave heavily-dagged animals over summer — the risk is too high.

Fleece rot — a moist, coloured, malodorous breakdown of the wool staple caused by bacterial activity in persistently wet fleece — is a significant welfare and quality problem in high-rainfall areas. Affected areas are typically the back and sides where rain accumulates. Management involves: avoiding waterlogged paddocks in high-rainfall periods; selecting for fleece structure that sheds water more readily; and in severe cases, earlier shearing to reset the fleece before rot progresses. Fleece rot also predisposes to fly strike by providing warmth, moisture, and odour that attract blowflies.

Blowfly strike is the most acute welfare emergency in Australian sheep management and a significant economic threat to any wool enterprise. The primary species responsible is the Australian sheep blowfly (Lucilia cuprina), which is present across virtually all sheep-producing regions of Australia and active whenever temperatures exceed approximately 12°C. In the hottest months in high-rainfall areas, the risk period is effectively continuous.

The sequence of events in strike is rapid. A female blowfly locates a susceptible site — typically a moist, warm, malodorous area such as a damp or daggy breech, fleece rot, a wound, or pizzle area in rams — and lays 200 to 300 eggs. In summer temperatures, these hatch to first-stage larvae within 12 to 24 hours. The larvae begin feeding on moisture and superficial tissue immediately. Within 24 to 48 hours, a visible strike wound has developed. Within 72 to 96 hours of initial egg-laying, an untreated animal can be in serious systemic distress from the toxins and secondary bacterial activity. Animals discovered with advanced strike — with deep, excavated wound tissue, or neurological signs — have a poor prognosis even with treatment.

The primary preventive strategies are: reducing susceptibility (crutching, shearing timing, dag removal, wound treatment); chemical prevention (backline pour-on insecticides with a defined protection period); and in commercial Merino flocks, mulesing (surgical removal of the breech wrinkle skin to create a smooth, bare area that does not hold moisture — a highly effective but controversial practice that remains widespread in Australian Merino production). Each approach has a role in a comprehensive prevention program.

Backline pour-on insecticides (synthetic pyrethroid-based or organophosphate-based products) applied at the registered dilution and volume provide protection periods of six to fourteen weeks depending on the product and season. Apply to dry animals. Wet animals or animals moved onto wet pasture immediately after application significantly reduce the efficacy of the treatment. Follow the withholding period (WHP) strictly — the withholding periods on backline insecticides range from seven days to significant periods for wool and meat, and are conditions of both the product registration and your market access.

Inspection frequency during high-risk periods (warm, humid weather, typically October to April in most of Australia) should be daily or near-daily for the highest-risk classes: heavily fleeced ewes with dags, rams with wet pizzle area, any animal with a wound or skin break. Early strike — a small, recently struck area with only first or second-stage larvae — is treatable with wound spray and recovery is rapid. Late strike requires broader wound debridement, systemic antibiotic treatment, and intensive aftercare. Know the difference and act at first detection.

Effective sheep management in Australia requires working with the seasonal calendar rather than against it. The production decisions made in autumn — particularly around joining — determine the enterprise's productivity for the following twelve months, and each subsequent season builds on or undermines what was done before. A systematic seasonal framework, adapted to your local climate and production system, prevents the reactive firefighting that characterises less-organised enterprises.

Summer in most of Australia is a period of nutritional pressure, fly risk, and heat stress management. Pastures are typically dormant or of low quality in non-irrigated systems; fly activity is at its peak; and water management becomes critical. The primary tasks are: maintaining body condition above the level needed to handle reduced pasture intake; supplementing where pasture falls below maintenance; monitoring closely for fly strike; ensuring water supply is reliable and clean; and completing any late shearing or crutching before fly pressure peaks. Mustering in the heat of the day in summer causes unnecessary heat stress — if work needs to be done, do it early morning when temperatures are lowest.

Autumn is the most important season in the sheep management calendar for breeding enterprises. This is when joining occurs and when the foundation of next year's lamb crop is laid. The priorities are: having ewes at target body condition score (BCS 3 to 3.5) at joining; flushing ewes with increasing nutrition for two to four weeks before and during the joining period; ensuring rams are fit, fertile, and in good body condition well ahead of joining (not assembled from the back paddock on the day joining starts); and completing vaccinations and health interventions before joining to avoid timing conflicts with pregnancy management.

Winter in temperate Australia is the period of early to mid pregnancy, and nutritional management in this period sets the foundation for lambing outcomes. Ewes in early pregnancy (first ten weeks) have modest nutritional requirements above maintenance — the emphasis is on maintaining the body condition established at joining. Winter pasture growth in southern Australia is often adequate for this purpose in good seasons, but in dry winters or on overstocked properties, supplement with hay or grain from early in the season rather than waiting until ewes are visibly deteriorating. The cost of feed at this stage is far lower than the cost of poor lambing percentages and increased neonatal mortality.

Spring is lambing season for most temperate sheep enterprises, with its particular demands on monitoring, nutrition, and emergency response. Spring also brings the dual challenges of rapid pasture growth (bloat risk in clover-dominant pastures) and the warming conditions that initiate the fly season. The transition from lambing management to post-lambing flock management — marking lambs, castrating ram lambs, drenching ewes and lambs, vaccinating lambs, and beginning the season's fly prevention program — typically occupies the first two months of spring and requires careful scheduling to avoid conflicts between tasks that require similar mob handling.

The value of good records in sheep management is proportional to the size of the enterprise and the intensity of the production system. A producer running twenty crossbred ewes for lamb production needs less formal record-keeping than one running 800 Merino ewes with a documented performance recording program — but even small-scale producers benefit enormously from basic mob records that allow trend identification over time.

The National Livestock Identification System (NLIS) is a legal requirement in Australia for any sheep and goats moving off their property of birth. All sheep must be identified with an approved NLIS device (typically a yellow ear tag for sheep born from 2017) and movements recorded in the NLIS database. Familiarise yourself with the current requirements in your state, as specific details of timing and record-keeping obligations vary and have been updated in recent years. Non-compliance with NLIS is a biosecurity risk and a legal liability.

Performance data that is worth collecting systematically for breeding ewes includes: individual ewe identification; date and type of birth (single, twin, triplet); birth weight where practical; lamb survival to weaning; ewe BCS at joining, pregnancy scanning, and pre-lambing; and any significant health events. Aggregate data from this record base — percentage ewes scanning in lamb, average lambs born per ewe joined, percentage lamb survival to weaning — allows objective comparison of annual performance and identification of management or genetic factors that are limiting productivity.

Genetic recording through the Sheep Genetics service (merinos.com.au and their OVIS and LAMBPLAN programs) is available to producers using registered rams and willing to collect the required performance data. The estimated breeding values (EBVs) generated through these programs allow more accurate selection decisions than visual assessment alone and are particularly valuable when selecting for traits that are difficult to observe directly, such as internal parasite resistance, reproductive rate, and carcase composition. Participation costs time but is available at no charge for commercial producers using rams from registered studs that supply EBV data.

A simple but often-overlooked record category is the treatment register: every animal treated with a veterinary medicine (drench, antibiotic, vaccine, pour-on) should have the treatment recorded with the date, product, dose, batch number, and withholding period. This is a legal requirement for food-producing animals in Australia and is audited in Quality Assurance programs such as Livestock Production Assurance (LPA). It is also simply good management — without records, you will repeat treatments unnecessarily, miss critical withholding periods, and be unable to identify patterns in which animals or groups are requiring treatment most frequently.