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Iron, Zinc and Copper in Mare's Milk¹

Michigan State University, East Lansing 48824

Abstract

Milk samples from three Arabian and seven Quarter Horse mares were obtained by manual expression of the contents of one mammary gland into acid-washed Pyrex beakers. The first sample (partum) was obtained 15 to 30 min. after parturition and before first nursing of the the foal. The respective milk concentrations (µg/g) of iron, zinc and copper at the designated sampling periods were as follows: partum 1.31, 6.43 and 0.99; 12 hr. 0.95, 2.83 and 0.83; 24 hr. 1.05, 3.65 and 0.73; 48 hr. 0.86, 3.73 and 0.66; 5 days 0.88, 3.46 and 0.44; 8 days 0.88, 3.29 and 0.44; 3 weeks 0.83, 2.81 and 0.29; 5 weeks 0.71, 2.24 and 0.25; 2 months 0.61, 2.06 and 0.23; 3 months 0.55, 2.15 and 0.25; 4 months 0.49, 2.44 and 0.20.

¹ Published with the approval of the Director of the Michigan Agricultural Experiment station as Journal Article No. 6598.

² Department of Animal Husbandry.

³ Appreciation is due F. R. Bennett, D. Richey and B. H. Good for their assistance and cooperation.