Thank you for all of your emails with prayers of concern and support for Frankfurter. After a lot of tests and opinions, we have determined that Frank tore his ACL in is back right leg. This is not related at all to his earlier surgery for the disc pressing on his spinal column. He is back at the "animal hospital" and will have surgery sometime on Friday morning to repair this torn ligament. He should be able to come home Saturday morning. Then, we don't want to have to go back there for a long time unless it's just to stop in and say, "hi!"