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Effect on the Performance of Pigs from Birth to Market Weight of Adding Fat to the Lactation Diet of their Dams¹

Agriculture Canada, Research Branch, Ottawa, Ontario KIA 0C6

Abstract

A total of 22 sows were fed a basal diet with either 10% corn oil (CO) or 10% corn starch (CS) added for 5 days before farrowing and the subsequent 35-day lactation. The litters were offered creep-feed from 14 days of age. Milk from the sows was sampled at farrowing and then at weekly intervals; blood samples were taken from piglets at 1, 3 and 5 days, then weekly to weaning. Two piglets per litter were killed at birth and two at 35 days for carcass determinations. A shoulder fat sample was excised from pigs at market weight.

The fat percent of the colostrum was lower (P< .01) than that of the subsequent milk; the feeding of fat to the sows increased (P< .01) the fat content of the milk (9.4% vs. 6.8%) and the proportion of linoleic acid in the milk fat of the CO-fed sows was higher (P< .01) than in that of the CS-fed sows.

¹ Contribution No. 537, Animal Research Institute.

² Dr. D.T. Spurr (Statistical Research Service, Agriculture Canada) collaborated on the statistical analysis of data; the author wishes to acknowledge also the assistance by the following in various aspects of this study: J.F. Hunter (care of animals), Elsa R. Swedko (blood glucose and free fatty acid analyses), P.H. Lavictoire and P.J. Brackenridge (milk and body fat analyses).