This sounds good....

[Moli]

http://www.the-pat.net/

Although a bit expensive..............for cats and dogs............

[dandysmom]

Very interesting; amazing what technology can do now. A bit pricy, but what price peace of mind? It's like insurance, you hope you never need to use it, but it's there if necessary. Not as practical for cats, however, IMO. .

[alexgirl73]

would be fantastic for cats, if they didn't lose collars all the time lol. Though i would very much have appreciated it over the last few days!

[angieh]

I bet it won't be too long before something can be put into a microchip - and avoid having to worry about a lost collar. Some technology is really good and useful.