One of my favorite villagers is 17-going to turn 18 any moment, yet continues to do everything that the kids do! It's a wonder that she ever made it to adept doctor. And whenever I take her to the medical cactus...either it says she's doing something else or curious about something else...or she immediately gets up and for the food!

Taking a look at her "Likes" and "Dislikes" may shed some light on the behaviours that you've observed. Perhaps she likes "playing" or "exploring" or dislikes "work", or something similar to that.

And when you say she "continues to do everything that the kids do", can she also pick mushrooms? I'm just curious, since only children are able to pick mushrooms (:

You'll find that odd quirk with the doctors... the status line shows the next action they're going to take after they go to learn more of the cactus

i was wondering about that...my dr keeps standing at the cactus and it says "Eating" or "Arguing" most of the time....and i just thought she was weird