To obtain a formula feed for raising baby pigs in a suckling period, which is supplied to baby pigs from about weaning to 30 kg weight, increases the intake of the feed, eliminates baby pigs of maldevelopment and developmentaldelay and thereby reduces loss of the hog raising industry, and to provide a method for improving development of baby pigs by supplying the feed to baby pigs. 離乳前後から体重30kgまでの子豚を対象として、その飼料摂取量を増大させ、発育不良や発育停滞の子豚をなくし、もって養豚産業のロスを軽減できるほ乳期子豚育成用配合飼料とそれを給与して子豚の発育を改善する方法を提供する。 - 特許庁