Chinese herbal feed additives for piglets do work, but only inside a narrow window, and this trial maps the edges of it. A fermented blend of 18 herbs plus probiotics lifted average daily gain in piglets from 309 g to 402 g and average daily feed intake in piglets from 489 g to 604 g. The best result came at 0.2 percent held for a full 28 days. Push the same blend to 0.4 percent for 28 days and the pigs finish lighter than pigs that got nothing at all. The problem this study was built around Weaning splits a piglet in two directions at once. Feed intake drops. The…