Well almost. Peter Callaway from the lost and found pet website www.pawtrax.co.uk has been working on such a device for the last year and it is now ready for sale to pet owners in the UK

Using GSM and GPS technology, should your dog ever go missing all you need to do is to call up the PawTrax PATmicro, which is a small device clipped to the dogs collar, and within seconds you will receive an sms detailing the dogs position.

The device is compact and waterproof, works worldwide on any network and requires no subscription or monthy charges.