I just now saw this post. They sent him home Tues eve by ambulance. He was much improved. The delirium was gone. Now he just has the baseline dementia. (A lot of his mind is intact.)

It turned out he was having an adverse reaction to the antibiotic that the hospice doctor had ordered. It caused neurotoxicity, which manifested as delirium.

The VAMC doctors figured it out because the same thing had happened there once when they gave him that particular drug - moxifloxacin.

The hospice MD wanted me to start giving him morphine. This is why I say hospice is not to be overly trusted.