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In 58 Large White piglets weaned on the second day after birth and reared individually in two groups in a thermoneutral zone on a liquid 78.47% dehydrated diet of a macronutrient content similar to that of sows' milk the consumption of the liquid diet, gross energy (GE), water, N substances and lipids was measured up to 4 weeks of age. One group was offered the diet for sucking 10 times a day at 2-hour intervals and the other group, 6 times a day at 3-hour intervals. The consumption of diet, BE, water and macronutrients was high in all piglets. There were no significant differences in sucked meal size between the two groups fed at different frequency, except at the end of the 4th postnatal week. However, when related to live body mass or metabolic mass, the meal size was significantly (P<0.05) greater in less frequently fed piglets between 5 and 7 d and from 12 d onwards. Nevertheless, the daily ingestion of the diet and its components by less frequently sucking piglets was lower. Related to live body mass and metabolic mass, the daily ingestion of the diet by these animals was lower only up to 13 d. Afterwards this difference disappeared; from 14 d the piglets were able to compensate effectively for the limited frequency of contact with food. It is concluded that the control of high consumption of food in piglets kept in isolation changes at the end of the second postnatal week, i. e., in the weaning period, in that the role of short-term local conditions in the gastrointestinal tract begins all at once be overlapped by long-term control mechanisms reflecting the metabolic situation of the individual more accurately.

Influence of Daily Sucking Frequency on the Consumption of Liquid Diet in Early-Weaned Piglets