This project aims to create a popular scientific review of the knowledge of using leys for horses, with focus on feeding, and based on existing research within the area. The target group is the horse industry in Sweden and the project comprise Nordic conditions. The project consists of three parts; nutritive values of forages for horses; harvest, conservation and storage of forages for horses; and hygienic quality ad feed safety in forages for horses. These parts are all important for both horse keepers and forage producers. The project group consists of researchers from SLU, who are aided by a reference group with representatives for the horse industry. International experts are also associated to the project. The review will be written as a report in Swedish directed to forage producers and horse keepers, and it will be accompanied by a popular science summary in Swedish as well as scientific publication in English. The project is coordinated with a parallel project funded by SLF.