Prayers up. It could be a type of stroke.
We wondered that too, especially with vascular dementia.
I’m thinking it sounds like it could be a stroke, as well. :-(
Change in personality, dragging foot, feeling cold.
Prayers up for your dear FIL, Frank.
I know you are especially close to him, and, that you’d been his primary caregiver, up until recently.
Keep me posted 🙏🏻