Weeds constantly invade crop fields and pastures; therefore, it is important to know the potential quality of individual weed species in making management decisions concerning weed control. It is frequently assumed that weeds have low nutritive value and livestock will not eat weeds, so expensive and time-consuming measures are often used for their control.¹² Some weeds are toxic or poisonous to livestock, and certain weeds are unpalatable – causing a reduction in total intake.⁹ Several weed species have thorns or spines that can injure the grazing animal’s mouth and/or irritate its eyes, which may lead to pinkeye.⁹ Other weeds can cause the milk and meat of livestock to have a negative taste or odor. Weeds also compete with cultivated crops and forages for moisture, light, and nutrients, but many weeds are nutrient-rich and digestible.⁹ The objective of this review paper is to recognize the nutritional values of weeds commonly found in pastures.²