Originally Posted by cbabbman
..I had a cat who had Megacolon and we went through constant challenges in dealing with it. High fiber, good quality food and a prescription of propulsid to keep him going for 12 years...
My cat Dave has had chronic constipation/megacolon for a few years now. What FINALLY helped us was NOT a high fiber diet (I tried this, and the vet said on one of his 6 visits to the emergency clinic to evacuate his bowls, that his poop was like "hay"), but switching him COMPLETELY over to an all wet/canned food diet, along with 2 doses daily of Lactulose. I swear, the Lactulose and all wet diet has made all the difference in this poor animal's poop habits. What has worked for Dave is this "low-residue" (I believe that's what it is called?) diet, not the high fiber. According to what the vet said, and from what I've researched, high-fiber diets only work when there is alot of water being ingested along with the high fiber. And as cats are notorious for not drinking alot of water (they are desert creatures afterall), the fiber just bunches together/blocks them up without the good intake of water to "puff" it up and move it through the colon...
Also, my old vet DID prescribe propulsid (I believe also called "Cisapride" ), but I chose not to go that route, as it was taken off the market (for humans) because it caused heart damage/failure in humans, and I did not want to take that chance with my Dave..Lactulose for him works just fine (for now), and is so much safer, I think it is a milk derivative, so it's much more gentle on his system. What Lactulose does, is "draws" water into the colon, and softens the stool, so it's easier for him to poop out, rather than the synthetic propulsid/cisipride, which causes the colon and muscles surrounding to be in a constant state of contractions I believe..
Good luck with your fat boy
, and research what you can, and talk to your vet about your findings, I know how terrible it is for both cat and cat-caregiver with constipation issues!