Oh my gosh. I am so So SO sorry to hear about Twinkie.
I was going to suggest making flyers....so good for you for already doing that. I would also go around to as many neighbors as possible and talk to them and hand them a flyer. That way you have personally contacted that many more people that will be on the look out for her. Can you place an ad in a local paper or on a local radio station?
I will keep you both in my thoughts and prayers and please do keep us posted.