Selling mouse kebabs on Malawi's roads
3 September 2012 Last updated at 17:26 BST
Food prices around the world are rising. Drought in the farming states of the American midwest and poor crops in eastern Europe have pushed up the cost of corn and wheat.
The increase in food costs has forced some people in developing countries to make changes in their diet and food choices.
In Malawi, which has the highest poverty levels in Africa, young men sell cooked mice to make money and provide cheap food.
The BBC's Ros Atkins reports.