“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.