Adjust the collar so it fits snugly around your dog’s neck. The collar is body heat activated and must be fit snugly to work. Keep the collar on your dog at all times, except when bathing or swimming.
| Collar Size | Fits Necks Up To | Dogs Weighing Up To |
|---|---|---|
| Small | Up to 37.5cm (14.7″) | Up to 35 lbs (15 kg) |
| Large | Up to 62.5 cm (24.6″) | Up to 110 lb (50 kg) |



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