You stated you are giving him water and electrolytes, that's why you havnt seen him drink any water. If he gets thirsty enough, he'll drink water on his own. You are also giving him nutri drench. Between electrolytes and nutri drench...that's too much of a good thing which can do more harm than good. Too much nutri drench will eventually cause diarrhea. Only use one or the other until he recovers. Do not give him catfood, it's too high in sodium and it'll cause more problems. Instead of yogurt, use buttermilk mixed with scrambled eggs. Buttermilk is easily absorbed whereas yogurt tends to pass through them. I'm just trying to help you 'fine tune' his treatment for a hopeful recovery. Good luck.