Table 2.

Activity variables measured by Vetrax® activity sensors (AgLogica Holdings, Inc., Norcross, GA).

Variable	Definition
Activity points	Total activity of dogs weighted by each individual activity (e.g., running worth more points than walking), calculated using a proprietary algorithm
Activity (min)	Duration of total activity including running and walking
No activity (h)	Duration of complete inactivity
Resting (h)	Duration of time not actively walking or running, but not completely inactive
Running (min)	Duration of running
Walking (min)	Duration of walking
Scratching (s)	Time spent scratching
Head shaking (s)	Time spent shaking head
Sleep	Scale of sleep quality measured using a proprietary algorithm based on absence of nighttime disturbance; scaled 0 – 100, with 100 being undisturbed sleep