Performance failure in Alaskan sled dogs: biochemical correlates

Area of Science:

• Veterinary medicine
• Animal physiology
• Canine sports medicine

Background:

• Long-distance sled dog racing is demanding.
• A significant number of competing dogs do not complete races.
• Understanding physiological differences in non-completing dogs is crucial for welfare and performance.

Purpose of the Study:

• To compare plasma biochemical variables between sled dogs that completed a race and those that retired.
• To identify potential biomarkers associated with race completion or retirement.
• To assess the clinical significance of observed biochemical differences.

Main Methods:

• Blood samples were collected from finishing and retired sled dogs within six hours of race completion/retirement.
• Plasma concentrations of magnesium, phosphate, triglyceride, urea nitrogen, and uric acid were measured.
• Plasma activities of alkaline phosphatase, alanine aminotransferase, and gamma-glutamyl transpeptidase were analyzed.

Main Results:

• Retired dogs had significantly higher plasma magnesium, phosphate, triglyceride, alkaline phosphatase, and alanine aminotransferase.
• Finishing dogs showed significantly higher plasma urea nitrogen, uric acid, and gamma-glutamyl transpeptidase.
• Observed biochemical differences were not deemed clinically significant.

Conclusions:

• Biochemical profiles differ between sled dogs that complete races and those that retire.
• Retired dogs in this study did not exhibit clinical signs of dehydration, electrolyte imbalances, or myopathy.
• Further research may explore the specific implications of these non-clinically significant biochemical variations.