Winter housing of sheep is increasingly common in UK and Irish systems, particularly around the lambing period. Good housing design and management significantly reduces disease, injury, and management-related welfare compromise. Understanding sheep behavioural needs informs effective housing provision.
Why House Sheep?
Housing provides management advantages (closer supervision at lambing, improved nutrition control, reduced parasite exposure) but introduces specific welfare risks. The decision to house should be welfare-positive overall — improving monitoring and nutrition while minimising stress and disease transmission risks.
Space Requirements
AHDB minimum space recommendations for housed sheep:
- Lowland ewes (single-bearing): 1.2–1.4 m²/ewe
- Lowland ewes (twin-bearing): 1.4–1.8 m²/ewe
- Hill ewes: 1.0–1.2 m²/ewe
- Ewe with lambs at foot: 2.0–2.5 m²/family unit
Understocking increases aggression and respiratory disease risk; overstocking increases competition for resources and disease transmission.
Ventilation and Air Quality
Respiratory disease (Mannheimia pneumonia, Mycoplasma ovipneumoniae) is the primary health risk in housed sheep — associated with poor ventilation, high stocking density, and mixing sheep of different ages. Natural ventilation systems (Yorkshire board or space board cladding with open ridges) maintain adequate air movement without draughts. Target: 0.5–1.0 m/s air velocity at sheep level, <25°C in lambing accommodation, ammonia below sensory threshold.
Bedding and Hygiene
Deep straw bedding (minimum 20cm) provides insulation, traction, and comfort. Bedding must be maintained — adding fresh straw as needed and removing soiled accumulations to prevent foot rot, navel infections in newborns, and mastitis risk. High-pressure washing and drying between batches breaks disease cycles.
Feeding and Water Access
Feed trough space: minimum 0.4m per adult ewe (0.5m for late-pregnancy ewes competing aggressively). Insufficient trough space causes feed competition, aggression injuries, and nutritional inequality within the group. Fresh water must be continuously available — housed sheep have higher water requirements than grazed sheep.
Social Management
Sheep are social animals that show significant stress when isolated from conspecifics. Housing in groups is normal; mixing unfamiliar groups causes aggression and social disruption. Establishing pen groups before housing — and maintaining consistent groups throughout the housed period — minimises social stress.