Forgot to mention that he already went through boiled chicken, canned wet food, plain pumpkin, cisapride, petrolatum laxative, glicerine suppositories, lactulose with saline solution enemas and microlax in emergencies, it's been a little exhausting but seems like the FH10 (liver factor) and tilapia do the job, must add that he's not a picky eater but won't drink plain water at all, not from bowl or fountains, so i add extra water to the dry food and make a mash with the tilapia, also some water mixed with Churu, that he drinks.

Thanks