Dietary crude protein concentration does not affect the leucine requirement of growing dogs

S. J. Delaney, A. S. Hill, R. C. Backus, G. L. Czarnecki-Maulden, Quinton Rogers

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The objective of the present study was to examine the interaction between graded levels of leucine and dietary crude protein. Dose-response curves were generated using four 3 × 3 Latin squares (two dogs/square). Each square represented one of two concentrations of crude protein (140 or 280 g/kg diet) and one of two combinations of three concentrations of leucine (5.0, 7.0 and 9.0 g/kg diet or 9.0, 11 and 13 g/kg diet). An additional experiment was performed by feeding crude protein at 210 g/kg diet with either 7.0 or 11 g leucine/kg diet. Weight gain, food intake, nitrogen retention, plasma albumin and plasma amino acids were measured. The requirement was determined to be the minimum leucine concentration required to maximize weight gain and nitrogen retention. For 8-14-week-old male Beagle dogs, 140 g crude protein/kg diet in a diet containing 18 kJ metabolizable energy/g does not appear to support maximal growth. The leucine requirement was not affected by doubling the dietary crude protein level from 140 to 280 g/kg diet. From these results, the leucine requirement of 8-14-week-old Beagle dogs appears to be 11 g leucine/kg diet independent of the level of dietary crude protein, whereas dogs over 14 weeks require only 7 g leucine/kg diet for maximal nitrogen retention.

Original languageEnglish (US)
Pages (from-to)88-100
Number of pages13
JournalJournal of Animal Physiology and Animal Nutrition
Volume85
Issue number3-4
DOIs
StatePublished - Apr 1 2001

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Dietary Proteins
Leucine
leucine
crude protein
Dogs
Diet
dogs
diet
Nitrogen
Beagle
Weight Gain
nitrogen
weight gain
Proteins
metabolizable energy
Serum Albumin
dose response
albumins
food intake
Eating

ASJC Scopus subject areas

  • Animal Science and Zoology
  • veterinary(all)

Cite this

Dietary crude protein concentration does not affect the leucine requirement of growing dogs. / Delaney, S. J.; Hill, A. S.; Backus, R. C.; Czarnecki-Maulden, G. L.; Rogers, Quinton.

In: Journal of Animal Physiology and Animal Nutrition, Vol. 85, No. 3-4, 01.04.2001, p. 88-100.

Research output: Contribution to journalArticle

Delaney, S. J. ; Hill, A. S. ; Backus, R. C. ; Czarnecki-Maulden, G. L. ; Rogers, Quinton. / Dietary crude protein concentration does not affect the leucine requirement of growing dogs. In: Journal of Animal Physiology and Animal Nutrition. 2001 ; Vol. 85, No. 3-4. pp. 88-100.
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