Thanks for your replies.
Ali I am a member of common dog, not sure why I didn't think about posting there!!

Hi Julie,

I'm the admin for a Facebook group called 'Common Dog'. It's for all dog-related stuff in Clapham. We have lots of dog owners in our group.

It might be worth posting there. We've got a number of members who have brought dogs to London from USA & other distant countries.
Here's the link:-
https://www.facebook.com/groups/343360205806453/

No experience but have you tried contacting the airlines? They do this all the time and should be able to help explain the procedure.

I've done this but with cats (brought 3 cats to the United States from Tanzania. I then brought them with me to the UK which was WAY more difficult!). It was dead-easy (proof of rabies vaccine, quick "inspection" upon arrival) though the laws may have changed. Have a look here for a start:

http://www.cdc.gov/importation/bringing-an-animal-into-the-united-states/dogs.html

Good luck!

Hello
Does anyone have any experience or knowledge of relocating a dog to the USA, specifically California? Can you recommend any agencies? I'm not quite sure where to start on this. Just about to call my vet and see if they have any advice, but if anyone else can help I'd be really grateful.

Many thanks
Julie