There is an increasing interest in biochar for soil improvement, as carbon sink and as feed additive. Biochar has the ability to bind aflatoxins and anti-nutritional substances in feed and can also bind to certain bacteria, and thereby improve chick performance and health. Biochar can reduce emissions of ammonia from manure, with positive effects on the value as fertilizer and on the global environment. The aim of the project is to provide scientific evidence that can be of benefit for chicken farmers’ when deciding if biochar is motivated to include in chicken feed. In a trial with chicken effects of inclusion level of biochar in the feed on growth, FCR, immune function, vitamin uptake and development of gut microbiota, are studied. In addition, ammonia emission from the manure is analyzed. In a second trial effects of biochar on chickens infected with Eimeria parasites are studied with the aim to see if biochar can alleviate symptoms of chickens affected by coccidiosis.