Impacts of meloxicam administration before temporary calf weaning on physiological and reproductive responses of beef cows

Journal of Animal Science
R F CookeJosé Luiz Moraes Vasconcelos

Abstract

The objective of this experiment was to evaluate temperament, physiological, and reproductive variables in beef cows assigned to an estrus synchronization + timed AI protocol including eCG administration, 48-h temporary calf weaning (TCW), or TCW + meloxicam administration. A total of 943 lactating, multiparous, nonpregnant Nelore cows, allocated into 8 groups of approximately 120 cows each, were assigned to the experiment. Groups were maintained in individual pastures and assigned to the following estrus synchronization + timed AI protocol: a 2-mg injection of estradiol benzoate and an intravaginal progesterone-releasing device (CIDR) on d 0, a 12.5-mg injection of PGF on d 7, CIDR removal in addition to a 0.6-mg injection of estradiol cypionate on d 9, and timed AI on d 11. Within each group, cows were randomly assigned on d 9 to 1) TCW from d 9 to 11 (TCW-CON; = 317), 2) no TCW and a 300-IU injection of eCG on d 9 (NOTCW; = 311), and 3) TCW-CON in addition to meloxicam administration (intramuscular; 0.5 mg/kg BW) on d 9 (TCW-MEL; = 315). Cow BW and BCS were assessed on d 0. On d 9 and 11, blood samples were collected, and cow temperament was evaluated via chute score and exit velocity. Pregnancy status was verified 30 d afte...Continue Reading

References

Dec 2, 1996·Animal Reproduction Science·M KuranP J Broadbent
Mar 9, 2005·Journal of Animal Science·J D ArthingtonD C Miller
May 11, 2007·Hormones and Behavior·Marina A G von Keyserlingk, Daniel M Weary
Sep 28, 2010·Journal of Animal Science·R F Cooke, D W Bohnert
Apr 11, 2012·Journal of Animal Physiology and Animal Nutrition·R F Cooke, J D Arthington
Oct 31, 2013·Advances in Experimental Medicine and Biology·José Luiz Moraes VasconcelosReinaldo F Cooke

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