Put new shiny black stall mats on the barn floor between her stall and her "ensuite" across the way.
Put a piece of melon, with the peel removed, in the middle of the mats.
Step back and hide your chuckles behind your hand as you watch piggy first, tentatively, step onto the mat - one foot on, then back, then on, then back...two feet on, then back, then on, then backi....(Piggies don't like change and don't like new surfaces to walk on).
Laugh even harder as she finally gets the courage to go for the melon, but has to chase the slipperly little tidbit all over the mat with her snout.
Get on with your work as piggy continues to roam about looking in vain for more treats before waddling back to her bed.
Thanks, Ellen, for your help with the stall mats - a very wet, heavy job! I hope you enjoyed the entertainment Petunia provided as much as I did!