Johnston Jeff Euro Depurative Pigeon Mix is a complete feed made with only the high quality ingredients you#d expect from Johnston Jeff.Johnston Jeff#s blends are individually developed to give the right levels of nutrients, richness and variety, and the results shine through. Birds thrive. Johnston Jeff only use top quality ingredients and never compromise. Many of Johnston Jeff#s ingredients are human grade and critically, they clean seed and nut types individually to a purity level of 99.9%.