It may be Fred is experiencing a multitude of different issues that are affecting his health. Judging from him being seen walking around and looking lost, he may be experiencing a form of dementia or even Alzheimer's disease. The problems of loss of weigh, having a messy house, lack of bathing, and eating one meal a day shows Fred is having a very difficult time performing activities of daily living (ADLs) and this is a severe problem because he isn't able to take care of himself like he needs. The last problem noticed with Fred was that he refuses to take his medication regularly. These problems may deal with living alone and depression, but because he is older it is likely that disease may be playing a role. To fix the issues I would suggest
