Therefore, the stress of weaning can have lifelong effects on porcine growth and performance.2 Enhanced feeding management practices around the time of weaning can be beneficial to ease nutritional stressors and negative impacts during this period.2 The objective of this study was to investigate the effect of supplementation with an isotonic protein solution in the peri-weaning period, using growth parameters, feed efficiency, mortality, and antibiotic usage in the 6-week post-weaning period as the major outcomes.