This document discusses the harmful effects of forage crops. It covers several key points: 1) It defines forage crops as plants cultivated primarily for animal feed and discusses factors that determine forage quality, including acceptability, chemical composition, and nutrient digestibility. 2) It outlines several anti-quality and anti-nutritional factors in forage crops that can harm animals, such as bloat-producing proteins, nitrates, prussic acid, oxalates, and mimosine. 3) It provides examples of management practices that can help prevent issues caused by these harmful compounds, such as splitting nitrogen applications, curing hay properly, and avoiding grazing stressed plants. The document emphasizes assessing