TMI MY DAD HAD

Open heart surgery. He has extreme swelling in his balls. I’m not kidding they are abnormally large and it’s because he is having fluid retention. I keep pushing him to drink water, but he doesn’t want to eat or drink anything. He doesn’t have much control over his bowels and I’m not sure what to feed him. I know low sodium and no processed foods, but all he wants is pudding. I need help!