i think that a lot of soft poo is better than no poo, since you have him on reglan and cisapride.....it seems they are working.
did you try the shredded wheat? maybe give him another day to see if he is just working it out of his system..........
here are definitions of the two drugs:
Cisapride is used to stimulate the movement of food through the digestive tract. It aids in the treatment of chronic constipation and megacolon (abnormal enlargement of the colon). It may also be used for disorders of the esophagus including reflux and megaesophagus (abnormal enlargement of the esophagus). Cisapride may affect the absorption of other oral drugs from the intestine. Do not use cisapride in animals with an obstruction, perforation, or bleeding of the digestive tract. At high doses, cisapride has caused birth defects in rats. Contact your veterinarian if your pet experiences diarrhea or abdominal cramps while being treated with cisapride
Metoclopramide (reglan) is used to prevent vomiting and esophageal reflux (stomach acid backing up into the esophagus) in many animal species. It may aid in the treatment of hairballs in rabbits. It is also used to prevent side effects, such as vomiting, resulting from chemotherapy. Because metoclopramide increases the movement of stomach and intestinal contents, it can affect the absorption of many oral drugs. Contact your veterinarian if your pet experiences constipation, behavior changes, sleepiness, or staggering while being treated with metoclopramide. NOTE: Since metoclopramide is chemically very similar to PABA, the sunscreen agent, it should not be handled by people allergic to PABA.