Phenotypic correlates of the working dog microbiome

Area of Science:

• Veterinary Science
• Microbiome Research
• Animal Behavior

Background:

• Working dogs play crucial roles in law enforcement and military operations.
• Existing research on the gut microbiome's link to behavior is primarily from lab animals, with limited data on working canines.
• Understanding the canine gut microbiome is vital for enhancing working dog performance.

Purpose of the Study:

• To characterize the gut microbiota composition in working dogs.
• To investigate associations between the gut microbiome and behavioral/performance outcomes in working dogs.
• To identify potential microbiome-based markers for working canine performance and health.

Main Methods:

• Collected fecal samples from 134 working canines for shotgun metagenomic sequencing.
• Gathered data on behavior, performance, and demographics.
• Utilized descriptive statistics and machine learning (XGBoost) for association and prediction modeling.

Main Results:

• Identified statistically significant associations between specific microbiome markers and traits including motivation, aggression, hesitation, sociability, obedience, and body condition score.
• Machine learning models demonstrated moderate predictive power for motivation, sociability, and gastrointestinal issues.
• Highlighted the potential of gut microbiome composition as an indicator of working dog status.

Conclusions:

• The study establishes a link between the gut microbiome and key behavioral and performance indicators in working dogs.
• Identified potential gut microbiome markers that could inform strategies for improving working canine welfare and effectiveness.
• Suggests future research directions for targeted interventions based on microbiome profiles.