90-year-old father defecating everywhere and not wanting to clean himself.

Earlier today my father had some sort of weird episode. I saw him walk around naked around the house and was so confused I went in the bathroom and there was poop everywhere I was telling him to take a shower and he wasn’t listening and being very aggressive and it was overall a complete hell hole disaster, he has been living with my family for the past 2 months and he does weird things, like humming so loud from day to night, doesn’t listen AT ALL. I don’t know if this was a stage of dementia or something but it’s hell.