Effect of long‐term overfeeding of a high‐energy diet on glucose tolerance in Shetland pony mares

Autor: Nicky M. M. d' Fonseca, Charlotte M. E. Gibson, David A. vanDoorn, Marta deRuijter‐Villani, Tom A. E. Stout, Ellen Roelfsema
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Journal of Veterinary Internal Medicine, Vol 34, Iss 3, Pp 1339-1349 (2020)
Druh dokumentu: article
ISSN: 1939-1676
0891-6640
DOI: 10.1111/jvim.15788
Popis: Abstract Background Overfeeding is associated with obesity and insulin dysregulation (ID), which are both risk factors for equine metabolic syndrome. How chronic overfeeding affects development of these factors is poorly understood. Objectives To examine the influence of long‐term high‐energy diet provision on body condition and ID. Animals Eleven Shetland pony mares. Methods In a 3‐phase study, the high‐energy group (n = 7) was fed 200% of net energy (NE) requirements (hay; concentrate: 36% sugar and starch, 13% fat) for 24 weeks, followed by 17 weeks hay‐only feeding before resuming the high‐energy diet (n = 4) for an additional 29 weeks. Mares were weighed weekly. Oral glucose tolerance tests were performed 3 to 4 times per dietary period. Results were compared with those of a control group (phase 1, n = 4; phases 2 and 3, n = 6) that received 100% NE requirements, using a general linear mixed model with post hoc Bonferroni testing. Results The mean body weight of the high‐energy group increased by 27% per high‐energy feeding period. During both feeding periods, area under the curve (AUC) for plasma glucose concentration decreased (P
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