Painful Lesions.pdf

Key Points:

Gestation Stalls: Offer advantages like increased space efficiency and mechanized manure handling but present significant welfare concerns due to close confinement, restricted movement, and barren environments. This can lead to stereotypies, reduced cardiac function, altered body conformation, and higher lameness rates.

Group Housing: Provides sows with more freedom of movement and the ability to express natural behaviors like rooting and social interaction. However, it raises concerns about aggressive social behavior within groups. Aggression levels are generally lower in established groups but can be managed through proper environmental design and management practices.

Welfare Concerns:

Stalls: Potential for stereotypies, reduced cardiac function, bone strength, and difficulty changing postures. Higher rates of lameness, skin lesions (decubital ulcers), and immune suppression/higher disease incidence compared to groups when hygiene is poor. No clear advantages in reproductive output.

Groups: Increased opportunities for physical activity, improved muscle and bone strength, better cardiac function, and easier posture changes. Aggression can occur but can be minimized through management practices. Generally lower lameness rates than stalls, but more skin lesions due to aggression. No clear advantage in reproductive output.

Conclusions:

Simplistic categorization of housing systems (stalls vs. groups) oversimplifies the welfare picture. Each system has unique advantages and disadvantages.

Management (stockmanship) is crucial for sow welfare, regardless of housing type.

* Individual assessment of specific housing systems is essential to balance animal welfare with practical considerations like space efficiency and cost.