Livestock Mortality Composting: Welfare and Biosecurity Benefits

On-farm composting of livestock mortalities provides a biosecure, low-cost and welfare-appropriate carcass disposal method that reduces disease transmission risk and manages inevitable farm animal deaths.

Key Facts

Livestock mortality is inevitable in commercial farming, with typical mortality rates of 1-5% depending on species and system
Traditional disposal methods including burial, rendering and incineration each have cost, logistical and environmental limitations
Mortality composting uses carbon-rich materials including wood chips and straw to decompose carcasses over 3-6 months
Properly managed compost piles reach temperatures of 55-65C that kill most pathogens including those causing notifiable diseases
The resulting compost provides nutrient-rich material that can be returned to farmland as organic fertiliser
Composting biosecurity protocols including site selection and pile management prevent disease spread to other animals and wildlife
US and Canadian livestock producers have widely adopted mortality composting, with regulatory frameworks supporting the practice

Welfare Considerations

While composting is primarily a mortality management issue rather than a direct welfare one, it has indirect welfare relevance in several ways. Effective mortality management reduces disease transmission between living animals, preventing welfare harms from disease spread. It enables farms to manage inevitable mortalities in a way that is less logistically challenging and costly than alternatives, supporting farmer financial viability and therefore capacity to invest in welfare. For biosecurity purposes, rapid carcass removal from the field prevents potential disease amplification near living animals. The welfare of wildlife that might access improperly managed mortalities is also protected by biosecure composting that prevents pathogen exposure. Mortality composting is part of good farm management that supports overall herd welfare.

What You Can Do

Support farming education programmes that include mortality management planning as a component of welfare training
Advocate for regulatory frameworks that make mortality composting accessible to farms of all sizes
Encourage livestock producers to develop mortality management plans that prevent disease transmission through rapid carcass management
Share resources on mortality composting from extension services with livestock farmers in your network
Support research into composting protocols for emerging diseases to ensure this welfare-positive disposal method remains viable