In animal farming, each production cycle is defined by a beginning. The most critical stage of this beginning is the weaning period. The feeding pattern, intestinal health, and immune system of young animals are reshaped during this period. However, this process can also bring problems such as stress, loss of appetite, diarrhea, and growth stagnation. In this issue, we address the theme of “Weaning Period and Young Animal Nutrition”, examining potential health problems encountered during the weaning period, feeding strategies to prevent these problems, and...