Katahdin Sheep

WHAT: Evaluates annual profit potential combining lamb production (twins, growth rates), wool value, and input costs. Dual-purpose breeds excelling in both meat and wool provide diversified income streams more resilient to market fluctuations.

WHY: Sheep economics depend on lambing percentages and fleece value. Breeds consistently producing twins with good growth plus quality fleece generate $200-400 annual returns per ewe, while single-lamb low-wool breeds struggle to cover costs at small scales.

HOW: Calculated from production data (lambing rate, lamb growth, fleece weight, wool quality) combined with input costs and efficiency traits. Exceptional (≥2.6): high lambing percentage + valuable wool + low costs. Typical (1.8-2.5): moderate production. Limited (<1.8): low output or high costs.

WHAT: Measures genetic resistance to gastrointestinal parasites (primarily barber pole worm and other internal worms), evaluated through fecal egg counts, documented resistance breeding programs, and performance in parasite-prone regions.

WHY: Internal parasites are the #1 health challenge in sheep, causing 30-50% of flock deaths and requiring frequent deworming that breeds resistance. Breeds with natural parasite resistance reduce deworming 60-80%, lower mortality, and maintain productivity in warm humid climates where parasites thrive year-round.

HOW: Rated from database trait 'parasite_resistance' based on genetic selection and documented performance. Exceptional (≥2.6): tested resistance lines, low fecal egg counts, thrives in parasite-heavy regions. Typical (1.8-2.5): moderate resistance, standard deworming sufficient. Limited (<1.8): highly susceptible, requires intensive parasite management.

WHAT: Evaluates wool production combining fleece weight (total pounds annually) and wool quality (fineness, crimp, luster, cleanliness) that determines market value. Measures both quantity and quality of fiber output.

WHY: Wool provides significant income diversification—quality fleeces fetch $50-200 annually versus $10-30 for low-grade wool. In meat-focused operations, wool that covers shearing costs is sufficient, but fiber-focused flocks need high-quality production to be viable.

HOW: Weighted formula: wool quality characteristics (60%), fleece weight (40%). Exceptional (≥2.6): premium quality (fine, lustrous, clean) + heavy fleeces 10-15 lbs. Typical (1.8-2.5): standard wool, moderate weight. Limited (<1.8): coarse or light fleeces with minimal market value.

WHAT: Evaluates adaptation to sustained heat above 85°F (29°C), measuring coat characteristics (hair vs wool, shedding ability), heat stress resistance, and documented performance in hot climates.

WHY: Heat stress reduces feed intake, lowers reproduction rates, and increases mortality, especially in wool breeds where heavy fleeces trap heat. Hair sheep and shedding breeds thrive in southern climates where wool breeds struggle without intensive cooling or frequent shearing.

HOW: Rated from database trait 'heat_tolerance' based on breed type and adaptation. Exceptional (≥2.6): hair breeds or natural shedders, proven in 95°F+ (35°C+), minimal cooling needed. Typical (1.8-2.5): moderate tolerance with shade and water. Limited (<1.8): heavy fleece, struggles above 85°F.

WHAT: Evaluates adaptation to sustained cold below 20°F (-7°C), measuring wool insulation, body size, metabolic efficiency, and documented winter performance. Particularly important for wool breeds in northern climates.

WHY: Cold stress increases feed requirements for maintenance, complicates winter lambing, and can cause mortality in newborns. Cold-hardy breeds with dense wool coats thrive outdoors year-round, minimizing barn infrastructure and winter feed costs.

HOW: Rated from database trait 'cold_hardiness' based on documented characteristics. Exceptional (≥2.6): dense fleece, northern origins, thrives in <0°F (-18°C) with basic shelter. Typical (1.8-2.5): moderate hardiness. Limited (<1.8): requires heated shelter or struggles with winter lambing.

WHAT: Measures daily management simplicity combining temperament, lambing ease (unassisted births), and mothering ability (bonding, milk production, lamb survival). Easy breeds require minimal intervention during critical lambing period.

WHY: Difficult sheep increase labor 3-4× through lambing interventions, bottle-feeding rejected lambs, and handling challenges. Breeds with easy lambing and strong mothers enable one-person operations where complicated breeds require round-the-clock monitoring during lambing season.

HOW: Weighted formula: lambing ease (50%), mothering ability (50%). Exceptional (≥2.6): unassisted lambing, excellent mothers, high lamb survival. Typical (1.8-2.5): occasional assistance, good maternal instincts. Limited (<1.8): frequent interventions, weak mothers, high rejection rates.

WHAT: Evaluates flock robustness across multiple dimensions: drought tolerance (forage scarcity adaptation), fescue toxicity resistance (endophyte tolerance), browsing ability (dietary flexibility), and terrain adaptation (sure-footedness on hills or rough ground).

WHY: Resilient breeds maintain productivity through challenges that devastate others—surviving drought years on sparse forage, thriving on fescue pastures toxic to others, utilizing brushy terrain, navigating steep hillsides. This determines whether flocks require intensive management or thrive with minimal inputs.

HOW: Weighted formula: drought tolerance (40%), fescue tolerance (25%), browsing ability (20%), terrain adaptation (15%). Exceptional (≥2.6): thrives through drought + fescue-tolerant + browsers + sure-footed. Typical (1.8-2.5): moderate resilience. Limited (<1.8): sensitive to stress, requires controlled conditions.