Have you tried puzzles? Freezing the bones to make them last longer?
Really work the mind, even just playing catch with a soft ball in the house while you're watching tv. Make her work for it with a sit or down first then gently lob it. Look up cool tricks like "bang, play dead" or high five on youtube and work together on mastering them.
Jasmine - Female Miniature Poodle - born Aug 15, 2010
Loker Delgado Von Stalworth - Male GSD - born Jan 26, 2012
Koda & Zazu - 5 year old male cats
Alex - Male Cocker Spaniel (rescue) - RIP Cuddlebug 2007-2010