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On Ovariotomy in Sows with Observations on the Mammary Glands and the Internal Genital Organs

Published online by Cambridge University Press:  27 March 2009

K. J. J. Mackenzie  and
F. H. A. Marshall
K. J. J. Mackenzie
Affiliation:
School of Agriculture, Cambridge.
F. H. A. Marshall
Affiliation:
School of Agriculture, Cambridge.
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Extract

(1) Distinct changes take place in the tissues of the mammary region in sows during the period of heat. These changes consist mainly of congestion of the glands. Moreover the part affected is in the pig of much commercial value.

(2) The black pigment often found in the mammary tissue of black sows is not associated with the recurrence of heat, and the bacon manufacturer who wishes to differentiate between sows slaughtered at this period and other sows must not rely on this pigment as a guide.

(3) Since ovulation occurs during oestrus and not during prooestrum it is advisable to “hog” the sow towards the end of her heat period.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 4 , Issue 4 , June 1912 , pp. 410 - 420
Copyright
Copyright © Cambridge University Press 1912

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References

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page 414 note 1 Messrs C. and S. Harris of Calne inform us that out of some 1400 sows 11·19% were found by them to show what their skilled assistants believed to be signs of having died in oestro.

page 415 note 1 Sanders, Spencer, Pigs, Breeds and Management, 2nd edition, London, 1898.Google Scholar This is what he Says:—“We have found that sows are most likely to prove in pig when mated at the later part of the period of oestrum.”

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