The collars have a device that delivers ... have “pre-warning” cues such as auditory or vibration signals that come before the electric shock. Used with verbal commands, this trains dogs ...

“I think shock collars should be used very sparingly and ... especially while at a dog park. The shock or even vibration of the collar could startle the dog into a defensive mode.

I tried one shock collar whose power level ranged from "0" to "99" on an arbitrary scale, and by the time I'd turned it up to "35" I had to drop it. Vibrating collars use a device similar to the ...

Authorities say a 13-year-old girl was forced to wear a shock collar meant ... I saw the two marks from the dog collar," said Villec, adding that the collar was vibrating in her hand.