I know it's hard, but he needs to drink for hydration. A hydrated person feels about 100 times better than a dehydrated person. I know the water tastes metallic but his body needs it. If he doesn't want to eat or drink, but has a feeding tube, at least keep him hydrated with the tube feeding water into his system. I think it's Gerri who always shares how hard it was to eat anything but she always persisted even it was just a bite at a time. The bad taste will go away.