I dont think that is the case.
Looking at the front page,
it shows that digging out of the element earns them more experience per success.
Digging Inside their element
Failure
* Energy lost: ~ 15
* Happiness Lost: ~ 10
* EXP gained: 1
Success
* Energy lost: 16-20
* Happiness Lost: 5-9
* EXP gained: 3-9
Digging Outside their Element
Failure
* Energy lost: 25
* Happiness Lost: 20
* EXP gained: 1
Success
* Energy lost: 17-30
* Happiness Lost: 15-19
* EXP gained: 13-29
So I am confused
Edit: and she just found more piles of food and only got 6 exp.
Edit: Edit:
AHA!
Ok, so she just dug up Flower Petals and received 18 exp points.
So digging success outside of their element will grant more exp except with Piles of Food.
Should we change this on the front page? Or should we change the system?