I just read on another thread about your missing dog.
Have you registered with Doglost?
http://www.doglost.co.uk/
As your pup is chipped there is a very good chance of getting it back.... you need to make him too hot to handle right now, go and register on there and your area helper will tell you what you need to do, there will be hundreds of members willing to help you with a poster campaign etc
Lisa x