Some grading systems exist for broiler chicken carcasses. In the European Union, grading includes mainly two categories. They include a level of nonconforming carcasses that cannot exceed 16.6% for grade A (good quality) and 33% for grade B (intermediate quality). Scoring criteria of broiler chicken carcasses are related to the following parameters. They have to be intact including the presentation, clean and free from visible foreign matter but also from foreign smell. They should also be free of visible bloodstains except those which are small and unobtrusive, of protruding broken bones and of severe contusions. In some countries, attention is also given to disjointed bones. The quality of blood vessels, the strength of bones and tendons are therefore becoming targets to improve broiler carcass grading. The two major pathologies dealing with bone strength and tendons are tibial dyschondroplasia and perosis. They are known to impact negatively animal performance due to lameness prevalence and this makes them even more important to control. These two pathologies have been partly related to nutritional issues which, still today include trace mineral supply. Tibial dyschondroplasia, perosis pathologies and the trace minerals deficiencies known to be involved in the disease will be described hereafter.