The short answer
Check three things: the maker's minimum dog weight, the device weight and the collar width it fits. Among trackers we cover, Fi Mini weighs 0.56 oz and Tractive DOG 6 lists a 9 lb minimum; hunting collars like PATHFINDER2 are built for bigger dogs.
Makers' size limits
| Tracker | Stated size detail |
|---|---|
| Fi Mini | 0.56 oz; 1.18 x 1.65 in; fits any collar in a silicone case |
| Tractive DOG 6 | Dogs from 9 lb |
| Tractive DOG 6 XL | Spec minimum 44 lb; FAQ suggests over 55.1 lb |
| PetSafe GPS Tracker | Clips to collars or harnesses up to 1 in wide |
| Dogtra PATHFINDER2 MINI | Designed for dogs about 25 lb and up |
What to check on your own dog
- Weigh your dog and compare with the stated minimum.
- Measure collar width; clip-on trackers have a maximum.
- Look at device thickness on a narrow neck.
- Make sure the collar can't twist the tracker under the chin.
Good small-dog options
Fi Mini is the lightest tracker we cover and lasts up to 2 months per charge. Tractive DOG 6 suits dogs from 9 lb with three-carrier coverage.
Products mentioned
Questions readers ask
What is the lightest GPS tracker you cover?
Fi Mini, at 0.56 oz.
Can a small dog wear a hunting GPS collar?
Hunting collars are heavier; Dogtra designs PATHFINDER2 MINI for dogs from about 25 lb.