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Pig-feeding experiments with cod-liver oil

Published online by Cambridge University Press:  27 March 2009

A. S. Foot ,
K. M. Henry ,
S. K. Kon  and
J. Mackintosh
A. S. Foot
Affiliation:
The National Institute for Research in Dairying, University of Reading
K. M. Henry
Affiliation:
The National Institute for Research in Dairying, University of Reading
S. K. Kon
Affiliation:
The National Institute for Research in Dairying, University of Reading
J. Mackintosh
Affiliation:
The National Institute for Research in Dairying, University of Reading
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Extract

Six litters of pigs farrowed, reared and fattened on a ration of barley meal, weatings, soya-bean meal, meat meal and minerals failed to thrive and in the later stages of fattening many of the pigs showed typical symptoms of vitamin A deficiency.

Six comparable litters raised under similar conditions and on the same meal mixture with ° 1 or 2% of a commercial cod-liver oil of guaranteed purity and standardized vitamin content made good progress and nearly all the pigs weaned in these litters were fattened for pork or bacon.

Estimations of liver reserves of vitamin A of the pigs receiving no cod-liver oil indicated that the liver store was exhausted soon after weaning. All pigs receiving cod-liver oil gradually increased their liver store of vitamin A. The stores rose approximately in proportion to the level fed and period of feeding. There was no evidence that the higher levels of cod-liver oil had any practical advantage over °%.

The symptoms shown by the pigs receiving no cod-liver oil included loss of appetite, cessation of growth, impairment of vision in daylight, abnormal gait, convulsive fits and nervous collapse. Pneumonia and/or inflammation of the intestines was found in all of seven pigs that died during the fattening period.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 29 , Issue 1 , January 1939 , pp. 142 - 163
Copyright
Copyright © Cambridge University Press 1939

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References

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