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ULTRASONIC BARK CONTROL COLLAR | PETSAFE, BARK CONTROL, DOG TRAINING, PETSAFE ULTRASONIC BARK CONTROL COLLAR
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DogRook Rechargeable Dog Bark Collar - Humane, No Shock Barking Collar - w/2 Vibration & Beep Modes - Small, Medium, Large Dogs Breeds - No Harm Training - Automatic Action Without Remote -
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Health-tracking dog collars claim to provide usable biometric data. Experts are preaching caution. | Mashable
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