Just wanted to let you all know that the vet visit with our old guy turned out informative and helpful. Actually, it wasn't as bad as I feared; it would seem that dogs can get IBS or irritated intestines which causes other problems. I really appreciate our vet how understands financial constraints and respects our decisions. We came home with pro-biotics and antibiotics for our Reggie; this will get him back on the mend quickly. He has always been a nervous dog and sensitive to food and stress which are two things that can cause these problems. Hopefully he will turn around totally within a day or two. Thank you all for your kind thoughts.