Whippets can be very timid so most likely she has NOT been picked up by somebody. Most likely she IS straying and probably within a few miles from where you lost her. This is why you MUST get the posters up. I would also recommend you get an advert in your local paper. YOU need to help this...
Dear Emlybob
Please do not give up on Indy - the chances are she hasn't given up and she's out there somewhere longing for you to find her. Without trying to sound disrespectful, you need to do more than just pray - you need to be proactive and get out there and put plenty of posters up in...