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Related Experiment Videos

Urinary indices in llamas fed different diets

M N Lackey1, E B Belknap, M D Salman

  • 1Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523, USA.

American Journal of Veterinary Research
|July 1, 1995
PubMed
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Llama diets affect renal function, with mixed hay increasing urine production and osmolality compared to grass hay. Renal function markers like creatinine clearance remained stable across diets.

Area of Science:

  • Veterinary Medicine
  • Comparative Physiology
  • Animal Nutrition

Background:

  • Llamas are important camelids with unique physiological adaptations.
  • Understanding renal function in llamas is crucial for their health and management.
  • Dietary components significantly influence kidney function and urine composition.

Purpose of the Study:

  • To evaluate the impact of two different hay diets (mixed alfalfa/grass vs. grass only) on renal function indices in adult male llamas.
  • To compare urine production, osmolality, electrolyte excretion, and enzyme activities between the two dietary groups.

Main Methods:

  • 12 healthy adult male llamas were fed either a mixed hay or grass hay diet ad libitum.
  • Urine and serum samples were collected at 6, 12, and 24 hours.

Related Experiment Videos

  • Measurements included endogenous creatinine clearance, electrolyte excretion, osmolality, urine enzyme activities, and protein concentration.

    • Main Results:

    • Llamas fed the mixed hay diet exhibited significantly higher urine production (median 1,307.5 ml/24h) compared to those on grass hay (median 927.50 ml/24h).
    • Median urine osmolality was higher in the mixed hay group (1,906 mOsm/kg) than the grass hay group (1,666 mOsm/kg).
    • Creatinine clearance (CL) did not show significant variation between diets or over time.

    Conclusions:

    • Diet composition, specifically the inclusion of alfalfa in mixed hay, influences hydration status and urine concentrating ability in llamas.
    • Mixed hay diets lead to increased urine volume and osmolality, suggesting altered water balance.
    • Renal function, as indicated by creatinine clearance, appears robust and unaffected by these dietary changes in healthy llamas.