My 90+ year old relative lives in an independent living facility where she pays for two meals in the dining room and eats breakfast on her own. A few years ago she fell a few times and was in rehab for a bit, apparently due to electrolyte imbalance. In my opinion, she was having short term memory issues and declining mentally. She also seemed depressed and sometimes talked about never leaving her room again.
When Covid hit, her facility closed the dining room, canceled activities, and delivered three meals a day to all residents. Overall, she seemed so much happier during this period. Instead of complaining about the place, she talked about how wonderful it was that they were being so careful. She also seemed more 'with it.'
Now that things are getting back to normal, she seems like she is slipping to me. The dining room has reopened and she's still getting two meals per day. She is more irritable and back to the relentless complaining. Is it possible that the full breakfast made a difference? It was an eggs/bacon/ toast type meal. She says she eats breakfast on her own, but I suspect she just drinks coffee.