Thank you all for your kind words.

We are still not sure it's dementia, but everyone is suggesting that.

Pichu doesn't seem to be in pain, even when his hind legs are shaking (and that happens rarely). The first thing that led us to think it's dementia is how he just stares into a corner or wall sometimes.

He's had a few better days and we're just taking it one day at a time, enjoying the time we have with him. I will ask the vet about the medication and we'll give it a try.

Johanna, unfortunately I am not posting too often here, just once in a while. If I only had the time to do everything I want, but there are not enough hours in a day.