Ruth, your application was received and is being reviewed. For some reason the auto response is not working correctly. Since everyone who does this is a volunteer, sometimes it takes a bit of time. How is your old greyhound doing? I had a Springer that had the same problem and we finally had to put her down. It was so hard but we felt that she hated us having to hold her up but if we didn't she would fall over and pee on herself. She was the best dog. I feel such empathy for you.
Ruth, you should have gotten an auto response to your application. If you did not, check your spam folder because they often go to spam until you ok the e-mail address. If you do not find it, resubmit it, then check for the auto response, THEN if you do not get the response, let me know and I will forward your page address so that someone who reviews the applications can contact you.