"Unwellness doesn't always show up in lack of movement," he warned.
Nathan Lawrence, chief executive of Heyrex, the company that manufactures the devices, said they could help identify possible health problems. Research shows an animal's activity level is linked to how it feels, he said.
One Kapiti Coast owner found that their dog needed treatment with a soothing aromatic remedy because "it just went absolutely mad" every time they returned home, Mr Lawrence said.
Use of the Heyrex device revealed the dog was not doing anything during the day. After treatment, its moods evened out.
Anxious owners who disliked leaving their dogs could also find the tracking device helpful.
Mr Lawrence added that cat lovers could soon have access to a similar monitoring product, with a feline-friendly version expected to hit stores later this year. APNZ