Effect of increased dietary protein and decreased dietary carbohydrate on performance and body composition in racing Greyhounds

Richard C. Hill, Daniel D. Lewis, Karen C. Scott, Mayuko Omori, Melissa Jackson, Deborah A. Sundstrom, Galin L. Jones, John R. Speakman, Celeste A. Doyle, Richard F. Butterwick

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Objective - To determine effects of increased dietary protein and decreased dietary carbohydrate on hematologic variables, body composition, and racing performance in Greyhounds. Animals - 8 adult Greyhounds. Procedure - Dogs were fed a high-protein (HP; 37% metabolizable-energy [ME] protein, 33% ME fat, 30% ME carbohydrate) or moderate-protein (MP; 24% ME protein, 33% ME fat, 43% ME carbohydrate) extruded diet for 11 weeks. Dogs subsequently were fed the other diet for 11 weeks (crossover design). Dogs raced a distance of 500 m twice weekly. Rectal temperature, hematologic variables before and after racing, plasma volume, total body water, body weight, average weekly food intake, and race times were measured at the end of each diet period. Results - When dogs were fed the MP diet, compared with the HP diet, values (mean ± SD) differed significantly for race time (32.43 ± 0.48 vs 32.61 ± 0.50 seconds), body weight (32.8 ± 2.5 vs 32.2 ± 2.9 kg), Hct before (56 ± 4 vs 54 ± 6%) and after (67 ± 3 vs 64 ± 8%) racing, and glucose (131 ± 16 vs 151 ± 27 mg/dl) and triglyceride (128 ± 17 vs 104 ± 28 mg/dl) concentrations after racing. Conclusions and Clinical Relevance - Greyhounds were 0.18 seconds slower (equivalent to 0.08 m/s or 2.6 m) over a distance of 500 m when fed a diet with increased protein and decreased carbohydrate. Improved performance attributed to feeding meat to racing Greyhounds apparently is not attributable to increased dietary protein and decreased dietary carbohydrate.

Original languageEnglish (US)
Pages (from-to)440-447
Number of pages8
JournalAmerican journal of veterinary research
Volume62
Issue number3
DOIs
StatePublished - Mar 2001

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    Hill, R. C., Lewis, D. D., Scott, K. C., Omori, M., Jackson, M., Sundstrom, D. A., Jones, G. L., Speakman, J. R., Doyle, C. A., & Butterwick, R. F. (2001). Effect of increased dietary protein and decreased dietary carbohydrate on performance and body composition in racing Greyhounds. American journal of veterinary research, 62(3), 440-447. https://doi.org/10.2460/ajvr.2001.62.440