You could blindfold her! J/K
I did this game with Kyleigh when she was a puppy.
I took three solid coloured tupperware containers (can't see through them) and I hid her bone under one of them and then I moved them around really fast. She had to sniff at the right one to get her bone - and by sniff, I mean I had to be sure she KNEW it was there ... she'd paw at it too!!! Then I knew she knew it was under THAT one!
(kind of like the pea under the shell game)
You could do this with her treats (just make sure you remember which one has it!) and only lift if up when she's got the right one
Marionís Zoo-Kyleigh, Raylan-cat, Echo-TAG,