GROWTH RATE OF THOROUGHBREDS. EFFECT OF AGE OF DAM, YEAR AND MONTH OF BIRTH, AND SEX OF FOAL

Authors

R. L. Hintz, Oklahoma State University, Stillwater
H. F. Hintz, Cornell University
L. Dale Van Vleck, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

January 1979

Comments

Published in JOURNAL OF ANIMAL SCIENCE, Vol. 48, No. 3 (1979). Copyright © 1979 American Society of Animal Science. Used by permission.

Abstract

Weight, height, and cannon bone measurements were obtained on 1,992 Thoroughbred foals. Colts were heavier than fillies at birth and the differences increased with age. Dams under 7 years of age and older than 11 years had foals of lighter weight at birth than mares 7 to 11 years of age and the differences persisted at 510 days of age. Foals born in April, May, or June were heavier than foals born in January, February, or March. Year of birth also influenced body weight. The trends for height at withers and cannon circumference were similar to those of body weight.