Mother will chew her food excessively. It does not matter what it is, meat, vegetables, mashed potatoes. etc. We never noticed her doing this in years past, but she really makes a production of it. There is nothing wrong with her teeth, we grind her meat. She even chews applesauce. Is this an OCD oddity common with dementia? She had even picked up other irritating quirks I won't get into. If you ask her why she does this she gets defensive, often raising her voice.