Leg health is one of the most prevalent causes of culling and late mortality during grow-out of heavy broilers. Leg problems are also sporadically observed during the first weeks of life causing increments in early culling as well. Leg issues have a major impact on welfare audits. The incidence of clinical lameness or leg disorders is typically less than 2 or 3%. However, many more broilers are subclinically affected presenting changes in gait patterns, reduced walking ability with detrimental effects for feed conversion and growth.