So my old lady, Macaroni, is getting close to the 3 year mark. She has significantly slowed down, and is starting to show her age. She has always been a super smart, super energetic girl, but lately, she seems to be more....disconnected...? She sometimes sits and stares in a corner, or wonders around aimlessly. She seems to not notice when someone has the cage open, and collecting rats for playtime, or passing out treats sometimes. My question is, I know dogs can get dementia like people, but can rats as well? I now rat phone her every day, sometimes multiple times a day. She's eating and drinking fine. Can still hold small treats in her front paws. She just seems like a space cadet from time to time. And I've noticed it's more and more each day. Is this normal?