Thank you all. I've gotten him to start drinking more liquid, and I've made sure to get him some healthy foods. He hasn't eaten very much these past few weeks since he's unable to get up and make himself a meal (I work during the day) so he still hasn't seen any results, but I'll keep him on it.
As for the copper coil, I'm going to go out today and get the nessissary materials to try that, as well. I do have one question, however. When using the coil, should he continue to wear it around his waist even while lying down for bed? Or does he take it off then and put it back on when he wakes up?