Some review3s here have complained about the cost but in fact, the AVID system is the least expensive. They only charge a one-time fee, as in for th elife of the pt, to register while the other popular brand, Home Again, requires an annual fee to maintain tracking. All of my pets are chipped and trust me, the tracking works. I was letting my dogs out in the early morning, about 4 am so obviously very dark, and didn't see the cat (dark gray) dart between the dogs' legs. I received a call from the local animal control office at noon indicating the cat had been found and identified through her chip; she was home at 4 no worse for the adventure. Due to inbreeding or some other unknown issue, the cat in question has issues..as the vet puts it, she isn't all there; it is doubtful she could have found her way home on her own.

Pros: IT Works

Cons: None