Hi there welcome. You do not want your husband to become dehydrated and malnourished - that's why nutrition and hydration is so important. It's the building blocks of healing. Tell him to try smoothies, a little fruit, dairy or almond milk, and some protein powder. It will help him. Feel a little more energetic. Otherwise he will end up in the hospital. Hugs and best of luck. Most of us have been there so we know what he's going through. Take care.