I'm new to forums so I may not be doing this correctly. I have an older cat, a stray I've rescued from my yard. I'm not sure how old he is but he is over 10 years old, at least. He's had a checkup at the vet and has been diagnosed with kidney problems and feline immunodeficiency. So as you can see this guys got some problems. He has developed constipation as a result of his kidney issues. The vet has him on Lactulose and Cisapride 1.5 ML of each twice a day. Six months ago he wound up at the local pet emergency clinic over the weekend because he was impacted. Much money later he was back home. Two days ago impacted again,on Friday,visions of the emergency clinic looming. Three enemas later, with no results, I got the quality of life speech from the vet. I don't want to put Lynx down, so I took him home. Hallelujah, he promptly went downstairs and took care of business. Probably just didn't like the surroundings at the Vets. However....today's Saturday and after being gone all day, I sifted the litter box looking and hoping for a BM. Nothing. I'm getting concerned. I guess my question is- I need a workable solution to this problem. The vet has told me that eventually the Lactulose and Cisapride will stop working. Has anyone had any luck with Lax ese? The reviews are glowing.